Data Sheet

Bulletin 71.1:SR5
2
W8966
Figure 2. Type SR5
Figure 3. Type SR5 Operational Schematic
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Introduction
The Type SR5 regulator is a compact, large capacity, direct-operated pressure reducing regulator. It is
designed for use in applications where a sanitary design is essential, such as pharmaceutical, biotech, or
food and beverage industries. The unit is available in 1/2 through 3-inch (DN 15 through 80) sizes with end
connections that will match up to Tri-Clamp® sanitary ttings. The Type SR5 is suitable for use in steam, liquid
or gas service.
Principle of Operation
The Type SR5 is a direct operated regulator. Pressure in the controlled system (regulator outlet pressure)
registers beneath the diaphragm of the regulator and opposes the force provided by the predetermined spring
compression. When regulator spring force exceeds diaphragm force exerted by the outlet pressure, the spring will
keep the valve plug open to permit additional ow to the downstream system. As downstream demand decreases
the outlet pressure will increase, this increase registers on the diaphragm and the valve plug moves closer to the
orice to decrease the ow rate.