Type C20D
Balanced Pressure Reducing Regulator:

Balanced double seat design permits rapid response to sudden changes in pressure. Also suitable for wide ranging continuous operating liquids. Nine spring pressure ranges provide reduced pressures from 15 inches of vacuum to 350 psi. Maximum temperature is 750 deg. F.

Type C34D
Balanced Pressure Reducing Regulator:

The C34 main valve was developed specifically for water service, with a balanced plug to avoid chattering or slamming and a composition disc to provide tight shut off. It is virtually unaffected by changes in initial pressure. Nine spring pressure ranges provide reduced pressures from 15 inches of vacuum to 200 psi and maximum temperature of 200 deg. F.

Type C34Q
Balanced Back Pressure Regulator:

Ideally designed to maintain a constant adjustable initial pressure in liquid lines and to rapidly respond to sudden changes in pressure. Eight spring pressure ranges provide back pressure control from 1 to 200 psi.

Type D34
Balanced Direct Operated Pressure Reducing Regulator:

Balanced single seat regulator especially designed for dead end water service where the flow is intermittent and changes rapidly. Cast iron with 316 stainless steel trim in sizes 1-6 inch, threaded or flanged connections. Three spring pressure ranges provide reduced pressures from 10 to 80 psi. Maximum temperature rating is 200 deg. F.

Type D36
Type D36 Pressure Reducing Regulator:

A high capacity direct operated reducing valve designed to handle variable flow rates while maintaining close regulation of reduced pressures. A bronze body single seat design in sizes 1/2-2 inch with three spring pressure ranges provide reduced pressures from 10 to 100 psi. Shown with optional strainer.

Type N6
Differential Pressure Valve:

Especially designed to maintain pump discharge pressures at a constant differential above a separate source of pressure. Three spring pressure ranges provide for differential pressures from 5 to 200 psi. Frequently used as a bypass and constant differential valve on boiler feed water systems.