WATER PRESSURE REGULATOR

The Cashco Model 6987 is a heavy duty, high pressure , self- contained
back pressure /relief water pressure regulator for controlling fluid
pressure between 50 and 800 psig (3.4 and 55.2 Barg) setpoint levels.
Pressure builds up to 20% above setpoint pressure are possible. The
body design is an angle configuration with a side inlet and bottom
outlet. Available options include flanged end connections and stellited
seating surface. APPLICATIONS for Model Designed for controlling a wide
range of fluids including air, inert gases, water pressure, fuel oil
and chemicals. Model 6987 is not normally utilized in steam service.

The Model 123 is a relief regulator suitable as a back water pressure regulator or bypass valve for controlling inlet pressure between 2 and 350 psig (.14 to 24.1 Barg) (525 psig (36.2 Barg) at 50% build-up). The body has an angle configuration with a side inlet and a bottom outlet. Sizes
are 1/2", 3/4", 1", 1-1/2" and 2" (DN15, 20, 25, 40 and 50). Available options include cryogenic construction, NACE construction and a large selection of trim, body and diaphragm materials. It is the most adaptable back pressure / relief regulator Cashco manufactures. Designed for controlling a wide range of fluids including air,inert gases, cryogenic gas or liquids, sour gas, chemicals, water, fuel oil and steam.

BUBBLE TIGHT is a commonly used term to describe the ability of a
control valve or regulator such as a water pressure regulator to shut
off completely against any pressure on any fluid. Unfortunately, it is
completely unrealistic. Control valves are tested to ANSI B16.104 and
FCI 70-2-1976 which is the American National Standard for Control Valve
Seat Leakage. This standard uses 6 different classifications to
describe the valves seat leakage capabilities. The most stringent of
these is Class VI which allows a number of bubbles per minute leakage,
depending on the port size of the valve. The correct response to the
question "Will that valve go "Bubble Tight"? is to say this valve is
tested to meet Class VI shutoff requirements.