Model 120 Rate of Flow Control Valve
The Model 120 has a wide range of applications: anywhere the flow rate
●Controls or limits flow to a predetermined rate
●Factory tested and can be pre-set to your requirements
Flanged Ends - 1 1/4" - 24" (globe);
1 1/4" - 16" (angle)
FLUID OPERATING TEMPERATURE
RANGE (Valve Elastomers)
Buna-N -20°F to 180°F
Viton 20°F to 230°F
Fluorosilicone -40°F to 150°F
EPDM 0°F to 230°F
Consult factory for others.
Body/Bonnet: Ductile Iron (epoxy
coated), Carbon Steel (epoxy coated),
Stainless Steel, Aluminum
Seat Ring: Stainless Steel,
Stem: Stainless Steel, Monel
Spring: Stainless Steel
Diaphragm: Buna-N, Viton, (Nylon
Seat Disc: Buna-N, Viton
Pilot: Stainless Steel, Bronze
Other pilot system
components: Stainless Steel,
Tubing & Fittings:
Stainless Steel, Copper/Brass
SPECIFICATIONS (Typical Aviation Fueling Application)The rate of flow control valve shall function to control or limit the flow rate, regardless of fluctuations in
upstream or downstream pressure.
The rate of flow control valve shall be a single-seated, line pressure operated, diaphragm actuated, pilot
controlled globe valve. The valve shall seal by means of a corrosion-resistant seat and a resilient, rectangular
seat disc. These, and other parts, shall be replaceable without removing the valve from the line.
The stem of the main valve shall be guided top and bottom by integral bushings. Alignment of the body,
bonnet and diaphragm assembly shall be by precision dowel pins. The diaphragm shall not be used as
a seating surface, nor shall the pistons be used as an operating means. The orifice plate shall be integrally-
installed in the valve inlet flange. The pilot system shall be furnished complete, installed on the
main valve and include a needle valve speed control and an inline strainer. The rate of flow control valve
shall be operationally and hydrostatically tested prior to shipment.
MATERIALS OF CONSTRUCTION
The main valve body and bonnet shall be ductile iron. All ferrous surfaces shall be coated with 4 mils of
epoxy. The main valve seat ring shall be stainless steel. Elastomers (diaphragms, resilient seats and Orings)
shall be Buna-N. The control pilot shall be stainless steel, while the opening speed control and
control line tubing shall be stainless steel. The orifice plate shall also be stainless steel.
The rate of flow control valve shall be suitable for controlling the flow rate over a range of
The rate of flow control valve shall be a
<150# flanged="">end connections, as manufactured by OCV Control Valves, Tulsa,
**Note: for military fueling valves, 6" 150# flanges have 20" face to face dimensions and 6" 300# flanges have 20-7/8" face to face dimensions.