The model 1390 is a three-way, normally open pilot that senses pressure under its diaphragm and balances it against an adjustable spring load. An increase in pressure above the spring set point moves the pilot to cause the main valve to close.
The Model 1390 is the standard pilot for OCV Series 129 Pressure Reducing Valves. Here it senses downstream pressure and modulates the main valve to maintain that pressure constant.
Model 1390 Pressure Reducing Pilot:
Stainless Steel ASTM A743/CF8-M
Elastomers (diaphragm, seat disc, o-rings
Rubber components are typically the only parts that may require periodic replacement.
These are available in kits consisting of the diaphragm, the seat disc and all O-rings.
Buna-N Kit-Part # 930090
Viton Kit-Consult Factory
EPDM Kit-Consult Factory
The Model 1390 is shown on OCV Valve Schematics as:
|EXAMPLE: Shown here on a Model 129 Pressure Reducing Valve.|