hydraulic press safety valve factory

The S50 Safety Shut Off valve is mainly used to avoid any damage to components as well as to avoid too high or too low pressure in the gas train. This could cause high financial losses and/or injured ...

Excavator pipe-rupture valves prevent uncontrolled cylinder movement in the event that a pipe or hose bursts. The ESV valve fulfills all of the requirements of the ISO 8643 and EN 474-5 ...

... base of an hydraulic cylinder, while the hose can be applied on the valve without any other components needed. The safety valves VUBA-DIN avoid an uncontrolled lowering ...

Hydraulic safety valves are made according to API 6A. When oil and gas leaking or firing, used for security protect on well site, the control system includes low pressure ...

Jereh Safety Valve is equipped with pneumatic, hydraulic or electric actuator, widely used in Christmas tree and surface manifold. In case of any emergency ...

The HBH Series valves are redundant blocking valve systems designed for critical applications where safe load holding is required for hydraulically controlled cylinders. These valve systems are equipped with position sensors for external monitoring by an electrical safety control system.

When designing a Hydraulic System, there are many factors to consider. Speed, Pressure, Horsepower, Valves, System Design...the list goes on! While these factors are important to consider, other important questions are often overlooked. Questions such as:How to properly isolate and dissipate stored energy from an accumulator? Can it be done automatically?

We"ll work with you to cover all the bases, mitigating the risk of hydraulic safety accidents and ensuring a lower cost of ownership for your investments.

An auxiliary passage, which is where the relief valve sends the extra liquid or gas to relive the pressure in a mechanism, is usually just an extra pipe that leads to a chamber where most likely the fluid is burned and the gas left over is released into the atmosphere. This is a particular necessity in the chemical and petrochemical manufacturing industry, as well as in petroleum refining plants, natural gas processing and power generation industries.

If the pressure in a hydraulic pump exceeds its designed pressure limit, internal leakage or damage to the pump components can occur. Depending on what the liquid is, such leaks could also cause serious damage to individuals in the vicinity and the environment.

In hydraulic control systems, the relief valve acts as a check valve, with a ball and an adjustable spring. When a relief valve opens to divert fluid into an auxiliary passage, the pressure inside the hydraulic cylinder drops and allows the valve to close. A hydraulic system will often employ several types of valves, although the hydraulic relief valve is usually the first encountered in the circuit.

Hydraulic relief valves can be found in almost any mechanism that runs on hydraulic power, such as automobile transmissions, brakes, power steering, aviation and in industrial and construction machinery. Relief valves are built from the same basic materials that most hydraulic valves are made from. The strong and corrosion resistant metals that are most common are stainless steel, aluminum, iron, brass and copper.

Aluminum and stainless steel are thin, light weight and flexible, while still retaining the strength necessary to control the flow of liquid. Usually when a heavy metal like iron is used for the body of a valve, one of those two lighter metals is still used for the disc or plunger.

Plastic is also used, particularly thermoplastics that are developed specifically to be used as valve material. Although they are not as resistant to corrosion as metal, they are cheaper. It"s all about options.

Distributor of hydraulic press safety, quick opening safety, rotary and safety valves. Amerigear®, Boston Gear®, Carlisle®, DeMag®, Desch® and IMI Norgren®, pneumatic, double action, quick release and flow control valves also provided. Repair and preventative maintenance services are offered. Value added services such as custom barcoding, CAD capabilities, OEM assembly, plant surveys and third party logistics are also available. Serves the metal processing, metal service center, paper mill and paper converting, canning, grinding, commercial laundry, marine, oil and gas and material handling industries. Vendor managed inventory (VMI) programs available. Kanban delivery.

Pressure relief valves are a critical component of fuel, hydraulic, and pneumatic systems in many industries. These valves can serve one of three functions—safety relief, pressure regulation, or protection against thermal expansion. The Lee Company offers a wide range of pressure relief valve configurations designed to ensure that we can offer the right solution for a specific application, helping to guarantee the safety and reliability of your product.

Safe environments rely on a complex system of components, from redundant control valves to rod locks, and light curtains to linear position transducers.

The most highly regulated sub-marketwithin the automotive manufacturing industry is the hydraulic press segment. The hydraulic press is located in every corner of automotive manufacturing, from injection molding of plastic bumpers to the hydroforming of chassis components. Some presses can be tiny, such as those used to stamp out small metal components for a dashboard support bracket. Other presses are absolutely enormous, like those used to stamp sections of frame rail; in fact, large enough to fit an entire person into the die.

The potential for personal harm at the hands of a punch press, injection-molding press, press brake or forge press is extreme. Presses can range from 5 to 100,000 ton or more, and even the 5-ton press can shear skin and bone like butter. Also, a punch press, for example, can operate at blinding speeds, leaving no time for operators to move their hand or body out of the way should a cycle be accidentally started. Because of the dangerous nature of the hydraulic press, various governmental or bureaucratic bodies have spelled out the particulars of press safety to ensure press-related injuries are avoided in automotive and other manufacturing environments.

In the U.S., machine build standards must adhere to OSHA 1910 regulations for Machinery and Machine Guarding. The OSHA regulations apply to general machine safety requirements, and also to non-press machinery. The regulation covers anti-tiedown (two handed operation), machine guarding, electronic safety devices (such as light curtains and limit switches) and other safeguards. These measures are especially important to a hydraulic press, but little of it is specific to a hydraulic press alone.

In Europe and Canada, the codes for hydraulic press safety are much more rigid, requiring even a used press to go through an extensive upgrade before it is commissioned into operation. The European Union uses the EN 693 standard, and in Canada the CSA Z142 code applies to any new or upgraded machine. Both standards are in addition to general machine guidelines and are specific to the hydraulic operation of the press.

Banner Engineering’s safety type 4 light curtains are non-contact machine guarding systems. They are ideal for protecting hands, fingers and ankles and guarding perimeters and access.

Both codes ensure that human interaction in locations where there is potential harm is kept to a minimum, and also that the machine is entirely safe in tool change or emergency stop situations. It’s common practice to use a light curtain, for example, to signal the machine to shut down should a hand reach inside a stamping press, but it’s more difficult to ensure the machine is safe even after the e-stop is triggered. To be safe, not only must the press stop the load or platen from dropping, but the press must be prevented from restarting accidentally while the machine is in safe mode.

Because of the current lean nature of automotive manufacturing, parts and components need to be supplied as closely as possible to the time they’re welded, bonded or bolted to the vehicle they’re home to. Lean manufacturing requires frequent changeover of tool and die in the manufacture of vehicle components. For an injection molding machine making dashboards, for example, the horizontal movement of the press is quite safe during mold changeover, as it is simply lifted out and replaced with an overhead crane.

For other hydraulic press examples, such as with a tandem line used for manufacturing floor pans, the vertical platens can weigh thousands of pounds. When they are changed for a different line, it must be done with platens in the air after the dies are removed. Even in the machine-off mode, several precautions must be taken to ensure the platen stays aloft, preventing it from falling and crushing workers.

Employing redundant, monitored control valves is the most common tactic to ensure the machine cannot press accidentally. Two inline valves, either after the pump or to control the cylinder(s) will provide redundant control, so that if one valve is stuck open, the other can close to prevent the press from further energizing. By monitoring these two valves with an electronic switch, the PLC can also determine the valve position is safe prior to machine startup, preventing undesired, accidental movement should one of them be stuck.

When two valves are used inline at the cylinder work port, they can also bleed the work port directly to tank to ensure there is no trapped pressure, which could potentially move the platen or load. If the redundant valves were used at the pump, a separate, single monitored valve can be used to dump work port pressure to tank while in the safe mode. Using redundant valving with dumping capability is often referred to as “block and bleed.”

Additional safety functions can be added to the hydraulic press, above and beyond the standard monitored block and bleed. These include rod locks, which can physically hold the rod of the cylinder during safe modes, such as when dies are being changed. A device literally clamps and holds onto the cylinder rods, so that even if there is a catastrophic oil leak or other damaged component, the platen cannot drop.

Limit switches or linear position transducers can read cylinder position at all times when the machine has power, which lets operators know the press is in safe mode. Just as with the redundant, monitored valves, position sensors can also prevent the machine from being fired up when dies are being changed. However, most automotive manufacturers and Tier 1 suppliers have strict company-wide safety procedures when working on machines, and most require individual technicians to lock-out the press’ electrical panel anyway, which obviously prevents any power from reaching the machine.

From a hydraulic standpoint, some presses are so extremely safeguarded as to use a relief valve on the rod port of the cylinder to prevent intensification from damaging the cylinder seals. A leaking cylinder seal could allow the load to drop unintentionally, which is clearly unsafe in any condition, not just during die change.

The exact measures used in automotive hydraulic press safety are dependent on the geography of installation and the engineers certifying the machine. Any machine upgrades should be done only by qualified persons, with consideration for electronic, mechanical and hydraulic integration of the chosen safety tactics.

The automotive manufacturing industry is the largest, most advanced and technologically sophisticated in the world, and with state-of-the-art manufacturing techniques such as hydroforming and carbon-composite injection molded body-panels, productivity and efficiency are not slowing down. Size, performance and speed are always improving, and with it comes the need for increased safety considerations.

Valve manufacturers today are able to inspect parts during assembly rather than after to produce near-perfect fluid pressure relief valves. The Promess Electro-Mechanical Assembly Press (EMAP) uses no pneumatics or hydraulics; instead, press motion is initiated by a servomotor and ball screw. A computer monitors the press ram’s position and pressing force, and accepts data from additional external sensors. To make the pressure relief valve, the EMAP is fitted with an attachment that pumps fluid through the valve at 1.2 liters/min while it is in the press.

Sensors provide information on fluid flow and pressure to the EMAP’s controller. While the valve is assembled, the system monitors the valve release pressure. The EMAP compensates for variations in the valve components that affect release pressure by compressing the spring inside the valve to increase its resistance. The EMAP presses the valve seat into the valve body until the target release pressure of 1,000 psi is reached.

Examples of extremely common hydraulic press applications are: automotive parts fabrication, microwave part fabrication, refrigerator component fabrication, dishwasher part fabrication and beverage can fabrication. Hydraulic presses are used for applications in many applications, though. These include: aerospace engineering, appliance, automotive manufacturing, ceramics, food and beverage processing, marine manufacturing, military and defense and pulp and paper. The hydraulic press is a vital element of industries where pressing and deep drawing operations are performed.

Joseph Bramah invented the hydraulic press in 1795. Sometimes, it is called the Bramah press. Leading up to this invention, Bramah first invented the flush toilet, then began studying fluids. This lead to his study of Pascal’s law, also known as Pascal’s principle. This is a principle of fluid dynamics that states that when pressure changes anywhere in a confined space of fluid that cannot be compressed, that same pressure change will be transmitted throughout the whole space.

Experimenting with this principle, Bramah put together a device featuring two cylinders, one large and one small, filled with liquid and connected with a pipe. He realized that if he put pressure on the top of the narrow cylinder, this pressure would transfer to the liquid in the larger cylinder. He and a colleague then figured out to put together a device featuring cylinders with matching pistons sealed with leather and self-tightening collars. This was the basis for the hydraulic press, which works using liquid pressure as force.

The hydraulic press was a great innovation. Before its invention, the hydraulic engineering industry was virtually non-existent. During the 19th and 20th centuries, manufacturers and engineers used the hydraulic press to innovate in many areas, including most notably farming machinery and transportation. Today, hydraulic presses work using the same principle and basic components, but they are more varied than ever and frequently work in conjunction with CNC technology.

A hydraulic press is a mechanical tool that shapes, deforms, and aligns various kinds of metals, plastics, rubber, and wood using the static pressure of a liquid, as specified by Pascal’s principle. The mainframe, power system, and controls comprise a hydraulic press’s mechanism.

First, hydraulic fluid is forced into a small double-acting cylinder by a hydraulic pump or a lever. There, the fluid encounters a sliding piston, which tries to compress the fluid. It instead shoves the fluid through the small cylinder into a larger cylinder, where the process repeats. This time, the compressive force forces the fluid back into the smaller cylinder. The fluid is passed back and forth between cylinders, causing pressure to build. Eventually, the pressure becomes too great that it reaches the anvil, baseplate or die. It presses the anvil, baseplate or die, deforming the material beneath it into the desired product shape. To make sure that the press does not overload the material, when it reaches its pressure threshold, the fluid activates a valve that activates pressure reversal.

A C-frame hydraulic press is employed for metal forming, straightening, blanking, punching, drawing and riveting; operations which require force and precision. Because of their narrow shape, C-frame presses take up less floor space than many other models, making them convenient for small to mid-sized facilities. C-frame presses can be manually or automatically operated. Hydraulic presses with a single column (or “C-frame”) feature a body frame shaped like the letter “C” with a single arm arrangement. They are exceptionally fast, rigid, function well as guides, and have great precision. Their applications are assembling, press fitting, bending operations, etc.

Used for tasks or applications that require coining, crimping, bending, punching and trimming. The welded frame of an H-frame press makes it capable of performing many different operations. The frame, press cylinder, pump, and bolster of an H-frame hydraulic press (two columns) are shaped like an “H,” and they are used for various tasks in repair shop maintenance facilities and production assembly lines. For low-volume applications, they have a hand pump available or air and electricity pumps where dependable operation is needed. The size of the cylinder in an H-frame determines how much force is available.

A laminating press makes it possible to apply film to many different materials or create encapsulating layers for electronic components. These presses are operated manually and compression takes place between two plates (one for heating and one for cooling).

Similar to laminating presses, stamping presses are specialized machines used to shape or cut materials using deformation with a die. Stamping presses, or stamp presses, are very common in the automotive and metalworking industries.

A transfer press stamps and molds material like plastic, rubber and metal. Flat plastic can be fed automatically into the end of the press where it is pulled from one die to the next by feed bar fingers.

Vacuum presses are hydraulic presses specialized to seal materials and products using atmospheric pressure. Vacuum presses are used to apply film to a wide variety of materials. Also, they’re used to encapsulate items like ID cards and credit cards in plastic layers.

Forging presses, also known as hydraulic forge presses, are used to shape metal only. In particular, they’re used to shape vehicle parts. Using either an open or closed mold, pressure, force and sometimes heat, they force metal blocks into shapes. During forge pressing, the metal stretches beyond its yield point, but does not crack or break.

Hydraulic press brakes are typically constructed from two C-frames on the sides, a movable beam on top and a tool mounted a table below. Unlike non-hydraulic press brakes, this press brake features two synchronized hydraulic cylinders on the frames, which move the beam. If automated, this press is called a CNC press brake. Manufacturers use hydraulic press brakes to fold, bend and otherwise cold work sheet metal.

A shop press, or hydraulic shop press, can repair, remove and set small parts like bearings, u-joints and bushings. It can also straighten bent parts. Shop presses work very well for automotive repair, especially in small garage businesses.

Hydraulic presses with four columns can exert a significant amount of force on any size work item. Depending on the needs of the production process, they can be either single- or dual-cylinder. A centralized control system with semi-automatic cycling, adjustable pressure, and variable compression speed is used with four-column presses. They are employed for trimming, die cutting, stamping and deep drawing, etc.

These presses are environmentally friendly and electrically powered. Compared to the traditional hydraulic and pneumatic press, the electric servo press operates more quietly and efficiently. The energy consumption of the electric servo press is also lowered by 75–80% simultaneously. Applications of electric servo press include precision assembly and precision riveting.

Gib-guided presses are frequently employed for the most demanding operations because of their robust design and great accuracy, which the H frame hydraulic press and four-post hydraulic press cannot handle. These gib-guided presses have the highest level of ram guiding and a multifunctional hydraulic cushion. They are frequently used in processes like deep drawing, sheet metal forming, bending, blanking, coining, punching, etc.

A hydraulic press has all of the essential components of a basic hydraulic system. It has a set of cylinders, punches (or pistons), hydraulic pipes that move the fluid, and a die (or anvil).

The pistons use liquid under pressure to push on the anvil with a high level of force. The hydraulic fluid is then forced into the cylinder when the pump is activated. There are two cylinders, and the fluid (either oil or water) is deposited into the smallest of the two. When the small piston is pushed, it compresses the fluid. This compressed fluid then flows through the pipe to the master cylinder. This pressure on the large master cylinder and its piston causes the flow to be directed back to the small cylinder.

At this point, the force on the fluids in the smaller cylinder creates even more force when it is pushed back into the master cylinder. It’s this extremely high force that brings the punch in contact with the die and accomplishes whatever press operation is being performed.

To use a hydraulic press, you must employ an operator that feeds or places stock on the bottom die. Said operator must make sure the stock is properly positioned, then activate the press cycle by pressing the pressure control switch. When the part is done, the operator must safely remove it.

Hydraulic presses are among the most common and efficient types of presses on the market, largely because they are capable of exerting more force than mechanical presses, machine presses or pneumatic presses. In addition, they offer benefits including: low initial costs, low maintenance costs, easy operation,

Hydraulic presses are simple and do not have many moving parts. In addition, they are globally available and easy to access. For these reasons, they are inexpensive to purchase and easy maintain. If a hydraulic press part breaks down or becomes ineffective at any time, it will be easy to replace and you won’t have to uninstall or disassemble the machine.

Hydraulic presses are designed to work well no matter what. For example, if a press is designed to exert 200 tons of pressure, then it will do so, even if you make a mistake in setting up. Likewise, you would have to try very hard to overload it, because hydraulic presses are designed to open their relief valve when they reach their set pressure limit.

It’s also easy to control and adjust press settings, per your requirements. For example, when needed, you can change: ram force, pressure dwell duration, press direction, press speed and the release of force.

Hydraulic presses are refreshingly quiet. They are free from the noise made by moving parts and flying wheels. When equipped with a properly mounted pumping unit, hydraulic presses exceed current US standard noise regulations.

Many presses can only deliver the full force of their power from the bottom. This is not the case with hydraulic presses. Instead, they can deliver a full power press stroke from any point. This saves users from having to buy extra presses to deliver force throughout the stroke. This is especially helpful during drawing operations.

Finally, thanks to their built-in overload protection, hydraulic press machine tools last much longer than tools used with other press machines. In addition, auxiliary equipment used with hydraulic presses lasts a long time because it is not subject to heavy vibration, shock or impact.

When designing a hydraulic press, manufacturers choose specifics like: material design, load limits and configuration based on your application requirements. Usually, manufacturers design hydraulic presses with stainless steel parts, since they are strong, durable, corrosion resistant and abrasion resistant. They may also use other high strength materials, such as other steel alloys, brass and aluminum. Hydraulic press manufacturers exert a lot of control over press ton handling limits and are able to custom design presses to handle virtually any ton load, from just one ton to upwards of 10,000 tons.

As far as configurations go, manufacturers usually choose from single and multi-station configurations. Single station presses feature a single set of press tools (a die and a punch) inside of a table. Multi-station presses, on the other hand, consist of multiple sets of press machine tools. These may perform the same operation on different materials, or they may perform multiple press operations from different stages.

Hydraulic press manufacturers can also customize your press by: altering the die shape, changing the hydraulic fluid type, increasing or decreasing folding down to the mm and increasing or decreasing the length down to the mm, among other possibilities.

Depending on your application type, industry and location, there will be different standards to which your press must adhere. In the USA, OSHA standards are of great importance. OSHA is a governmental agency that deals in worker safety standards. OSHA gleans many of its recommendations from another standards organization, ANSI (American National Standards Institute). We recommend finding a manufacturer that will base their construction standards on those from ANSI as well. As always, international groups, like ISO, put out standards as well. If you are requesting parts or products made for the military, those must meet Mil-Spec requirements. Likewise, for food or medical use, you must have a product that meets FDA standards or a press that can meet FDA standards. For more information on the standards your application must meet, talk to your industry leaders.

To find a hydraulic provider you can trust, check out those we have detailed on this site. We’ve gathered up a list of manufacturers with proven track records for high quality service. Each has something different to offer. We recommend that you take some time and peruse the profiles that we have created for each of them. Keeping your specifications in mind, pick out three or four you think might be able to best serve you. Then, reach out to each of them with your requirements, questions and concerns. Once you’ve done that, compare and contrast your conversations. Choose the manufacturer you feel will best fulfill your requirements, and get started.

Industry leading pressure and safety relief valve designs with over 140 years of technical and application expertise providing custom engineered solutions for O&G, Refining, Chemical, Petrochemical, Process and Power applications. Our designs meet global and local codes and standards (API 526; ASME Section I, IV & VIII; EN ISO 4126; PED & more). Gain insight into the performance of your pressure relief valves with wireless monitoring.

Magnum hydraulic systems are designed for presses. Our philosophy is to build simple, reliable, and easily serviceable systems. At the heart of our system are steel manifolds designed to consolidate valving, reduce pluming, eliminate leaks, and provide maximum service life. All pressure connection points have o-ring seals – no metal to metal pressure connections – no pipe threads. We use flexible wire braided hose to isolate frame stresses from reservoir and power units yet, maintain crisp system response. Our systems are designed with minimal pressure drops to allow lower usable tonnage range. All systems incorporate decompression on the blind side of the cylinder to eliminate shock pressure waves and ensure maximum service life for the system components. The entire system is designed to minimize response time to give you more parts per shift. Components are standard off the shelf, so replacements are readily available. Our manifolds incorporate efficient cartridge valve design that has extremely low leakage, fast shift time, and low pressure drops, all adding to system efficiency. Larger systems use piloted logic elements called poppet valves. These valves outperform large piloted spool valves in leakage, flow, and response time. Reservoirs are generously sized to minimize the need for external system cooling. Gap frame power units are self-contained and removable for service or remote location. Cylinders are premium quality NFPA compliant with easily serviceable rod bearings and seals.