gagging tool for safety valve quotation

Warning: All pipe plugs must be blocked or anchored adequately against a force equal to the head pressure times the cross-sectional area of the pipe. Debris or protrusions in the pipeline can damage a seal or rupture inflatable plugs. NEVER use an inflatable plug when its failure could cause injury or catastrophic damage or as the only means of protection for personnel working downstream. NEVER use a test pressure greater than the capacity of the weakest pipe or component in the system. Actual conditions vary so user must accept full risk and responsibility for the selection and use of any product. Please review our Warranty, Terms and Conditions.

Note 1: Mechanical and Molded Rubber Plugs are generally used for testing because fabricated Multi-Flex® style plugs may allow some seepage unless customized for a positive seal.

Test Gag is a bolt used for the spindle block of the pressure relief valve (PRV) to allow the PRV to be closed during the pressure test. The bolt should be tightened when the system has 80% of the pressure used. test (test pressure) to ensure that the PRV is closed at the test Pressure:

Before attempting to adjust the safety valves of any boiler,its essential to verify the accuracy of the boiler pressure gauge,safety valves must be set at a pressure not exceeding 3% above the approved working pressure each safety valve is adjusted independently.

You will hear a hissing sound, this is the floating condition of the valve and subsequently the valve will lift. if the valve lifts before the set pressure is achieved tighten the compression nut. if the valve fails to lift at the set pressure loosen the compression nut, maintain the boiler pressure constant while adjusting, reduce boiler pressure, remove gagging tool and fit to other valve for setting.

After both valves are set, remove the gagging tool and fire the boiler to maximum capacity. note full flow of waste steam from waste steam pipe. note pressure on gauge, the pressure should not exceed 10% of set pressure. after completion refit caps, cotter, locks and easing gear.

SAFETY RELIEF VALVES.- Safety relief valves are automatic valves used on system lines and equipment to prevent over pressurization. Most relief valves simply lift (open) at a preset pressure and reset (shut) when the pressure drops only slightly below the lifting pressure. Figure 9-24 shows a relief valve of this type. System pressure simply acts under the valve disk at the inlet of the valve. When system pressure exceeds the force exerted by the valve spring, the valve disk lifts off its seat, allowing some of the system fluid to escape through the valve outlet until system pressure is reduced to just below the relief set point of the valve. The spring then reseats the valve. An operating lever is provided to allow manual cycling of the relief valve or to gag it open for certain tests. Virtually all relief valves are provided with some type of device to allow manual cycling.

Other types of relief valves are the high-pressure air safety relief valve and the bleed air surge relief valve. Both of these types of valves are designed to open completely at a specified lift pressure and to remain open until a specific reset pressure is reached-at which time they shut. Many different designs of these valves are used, but the same result is achieved.

Although the number of relief valves provided must have a rated capacity equal to "all the steam the boiler can generate", most boilers can generate 10-20% more steam than the relief valves can relieve anyhow, if firing the best avaialable fuel at lowest possible excess air , with all mills and burners in service.

We are one of the reputed suppliers of specialized instruments like Pressure Switches, Differential Pressure Switches, Temperature Switches (weather proof as well as explosion proof), RTD / Thermocouples, Pressure Indicators / Temperature Indicators, Differential Pressure Indicators, Pressure Relief Valves, Volume Boosters, I / P Converters and other instruments and instrument accessories.

USA Industries" Pressure Safety Value Racks allow a standard, quick transportation rack for pressure safety valves of all sizes, while keeping them in an upright position. Store up to 12 units on our large rack and up to 14 units on our small rack (depending on the size of your valves). Further, with quicker and easier loading of your PSVs, you can rent cranes, trucks and other equipment for shorter durations, which help lower project costs. In addition, you also save time & labor by purchasing uniform racks instead of having skilled laborers build them out of miscellaneous materials.

Our in-house engineering and fabrication teams will customize a Pressure Safety Valve Rack to your exact needs. Call us today and see how we can help you at (713) 941-3797!

With a brass and sturdy bronze base, these Kunkle 900 series safety valves are built with multiple variations for a more customized use. Certified for air, gas, steam and liquid, these full nozzle designed valves are used for air and gas compressors, pressurized tanks (both gas and liquid), vacuum pumps, vacuum tanks and vacuum equipment, oil and gas separators, and pressure relief systems.

Model 918: Same as Model 912 except resilient seat/seal. Superior “leak-free” performance. FM approved with 316 SS base for fire pump installations in “BDD” and “BDE” sizes.

Model 919: Same as Model 913 except resilient seat/seal. Superior “leak-free” performance. Bronze body and bonnet. 316 SS trim (base, disc and disc holder).