caleffi safety valve manufacturer

TÜV Rheinland is an approved U.S. Nationally Recognized Testing Laboratory (NRTL) Certification Body for Pressure Equipment.  Meets ANSI Z21.22 "Relief Valves for Hot Water Supply Systems."

This function is performed by pressure reducing valves, i.e. devices that makes it possible to regulate the outlet pressure to predetermined optimal values.

Opening a tap on the circuit downstream from the pressure reducing valve causes a reduction in pressure below the diaphragm. The force of the spring is now able to overcome the force exerted by the water under the diaphragm: the spring forces the obturator downward to allow water to flow through the valve.

When all taps downstream of the pressure reducing valve are closed, the pressure below the diaphragm increases until equalising the thrust force (setting) of the spring. The obturator closes, maintaining the downstream pressure at the setting value.

... PRESSURE REDUCING VALVE SETTING involves setting the working pressure by adjusting the spring. To increase the setting simply turn the knob clockwise; the spring is compressed so that a higher downstream pressure value is needed to counter it. Valve setting must be carried out with all downstream taps closed. To perform this operation it is generally necessary to install a pressure gauge downstream of the pressure reducing valve.

... movement of the Caleffi pressure reducing valve obturator is unaffected by upstream pressure; thischaracteristic, which is essential for a pressure reducing valve, is achieved through the use of a "compensated seat":the obturator seat is designed in such a way that it has the same thrust surface area both upwards and downwards.

... the pressure reducing valve is frequently installed in homes: one of the most important features is the absence of noiseduring operation of the valve. Caleffi pressure reducing valves feature the perfect sectional profile in the area of the highest flow velocity to ensure extremely low noise levels.

When the calibrated pressure is reached, the valve opens to release the fluid into the atmosphere and prevents the pressure in the system from reaching levels that might damage the solar collectors and equipment

The safety relief valves manufactured by Caleffi are produced in compliance with the essential safety requirements of the Directive 97/23/EC of the European Parliament and the Council of the European Union for the Harmonization of Member States with regard to pressurized equipment.

Caleffi Safety Relief Valve, Series: 253, 1/2x3/4 in Nominal, Female, 150 psi, -20 to 360 deg F, Media: Water/Glycol, Brass Body, Stainless Steel Trim, High Resistance Elastomer Relief Seal, 2-3/4 in H

A wide variety of caleffi valve options are available to you, You can also choose from ball, control caleffi valve,As well as from water, {2}, and {3}. And whether caleffi valve is medium pressure, low pressure, or {3}.

There are 66 caleffi valve suppliers, mainly located in Asia. The top supplying countries or regions are caleffi valve, China, and 100%, which supply {3}%, {4}%, and {5}% of {6} respectively.

The Caleffi range of safety relief valves are WRAS approved and are designed to protect hot water cylinders and boilers in domestic hot water and heating systems. Valves are set to a certain pressure (bar g) and when the system reaches this pressure the valve is designed to open to release the pressure ensuring the system does not exceed its maximum safety limits.