How To Size The Relief Valve remains closed until the Set-Pressure is reached. When the Set-Pressure is met or exceeded, the spring will compress, allowing the valve to open and flow to occur. It is standard practice to publish flow values at 10% and 20% over the Set-Pressure.

Pressure Adjustments To adjust set pressure of valve, remove top cap, loosen lock nut and adjust pressure by rotating adjustment screw. Rotating the screw clockwise increases the compression on the spring thereby increasing the set pressure. Rotating the screw counterclockwise lowers the set pressure. Tighten the lock nut and replace top cap and gasket.

Water heatermixing valve

R-12-N-2, Set at 50 PSI (R Series, 1/2” NPT, 25-100 PSIG Spring Range, with a Factory Set Relief of Pressure of 50 PSIG)

The Braukmann AM-1 Series Thermostatic Mixing Valve from Resideo precisely adjusts, maintains, and limits hot water temperatures. Available in 1/2 in., 3/4 in., and 1 in. sizes. Suitable for heating only applications such as radiant and boiler systems.

Wattsmixing Valve

Setting Points of Flow The Relief Valve remains closed until the Set-Pressure is reached. When the Set-Pressure is met or exceeded, the spring will  compress, allowing the valve to open and flow to occur.It is therefore typical to specify the maximum capacity of a back pressure relief valve at 10% and 20% over set pressure.

The higher the system pressure is above the relief set point pressure, the more flow the valve will pass. It is therefore typical to specify the maximum capacity of a back pressure relief valve at 10% and 20% over set pressure.

3/4 mixing valvewatts

Example Application:  A 3/4" R Valve set at 50 PSIG will pass 2 GPM of water if the system pressure exceeds the set point by 20%. Model Code: R-13-N-2 ( R Series, 3/4” NPT, 25-100 PSIG spring range, EPDM disc with a Factory Set Relief Pressure of 50 PSIG)

Simple in Design To adjust set pressure of valve, remove top cap, loosen lock nut and adjust pressure by rotating adjustment screw. Rotating the screw clockwise increases the compression on the spring thereby increasing the set pressure. Rotating the screw counterclockwise lowers the set pressure. Tighten the locknut and replace top cap and gasket.

3/4 mixing valvefor water heater

Factory Setting of Relief Pressure Option: Specify Set-Pressure when ordering. Add desired factory set pressure to the end of the model code, See Example above.

1/2mixing valve

How The R-Series Works The R-Series & the 10691-Series Back Pressure & Relief Valves relieve upstream pressure in a variety of  processes. R-Series has a stainless steel disc and the 10691-Series has a soft elastomeric disc for tight shut-off. These valves automatically maintain desired maximum pressure in a vessel or system by relieving excess pressure into lower pressure return line or to atmosphere. Ideally suited for use as pump bypass control valve by maintaining constant pump discharge pressures. Used as a continuously operating valve or for protection against intermittent over-pressure conditions.

2Thermostatic Mixing Valve

Water, Liquids: Relief & Back Pressure Valves, The R Series & 10691 Series are economically-priced Back Pressure Relief Valves for Liquid service. Relief Valves/Back Pressure Valves are used to maintain a specific back pressure or to protect systems from an over-pressure condition.

Setting Points of Flow The Relief Valve remains closed until the Set-Pressure is reached. When the Set-Pressure is met or exceeded, the spring will  compress, allowing the valve to open and flow to occur.It is therefore typical to specify the maximum capacity of a back pressure relief valve at 10% and 20% over set pressure.

The Relief Valve is actuated by the system pressure on the inlet side of the valve. Valve loading is provided by a spring. The adjustment is done by removing the cap and rotating the screw clockwise or counter-clockwise. Spring load balances against the opening force of the up stream (or relief) pressure. Valve will open at the slightest increase in pressure above the spring set point, and will close when the excess pressure has been relieved. The higher the system pressure is above the relief set point pressure, the more flow the valve will pass. It is therefore typical to specify the maximum capacity of a back pressure relief valve at 10% and 20% over set pressure

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Simple in Design To adjust set pressure of valve, remove top cap, loosen lock nut and adjust pressure by rotating adjustment screw. Rotating the screw clockwise increases the compression on the spring thereby increasing the set pressure. Rotating the screw counterclockwise lowers the set pressure. Tighten the locknut and replace top cap and gasket.