Flow Control Valves

FR12-33 — Flow Control, Bypass-Type, Adjustable Orifice
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FR12-33 Valve

FR12-33 Valve symbol

A screw-in, cartridge-style, adjustable orifice, pressure-compensated, manually-operated,
bypass-type hydraulic flow regulating valve. It can be used as a priority-type flow regulator
or a restrictive-type 2-way flow regulator when the bypass port (2) is blocked.

The FR12-33 maintains a constant flow rate from 3 regardless of load pressure changes in
the system downstream of 3, or in the bypass leg at 2. Reverse flow (3 to 1) bypasses
the control orifice. The regulated flow increases from closed to fully open, with counter-
clockwise rotation of the knob.
Note: When used as a bypass flow control in applications where the priority flow port
will be blocked by external valving, bypass pressure drop will increase unless a small
amount of leakage is provided for the priority port. Consult factory.

• Bypass port 2 may be fully pressurized.
• Hardened steel parts for long life.
• Quiet, modulated response.
• Industry-common cavity.

Operating Pressure: 240 bar (3500 psi)
Flow Rate: 3-ported regulated flow: 068 lpm (018 gpm);
   2-ported regulated flow: 045 lpm (012 gpm)
Input Flow: 3-ported: 76 lpm (20 gpm) nominal; 114 lpm (30 gpm) maximum
Internal Leakage: 0.12 lpm (7.3 cu. in./minute) at port 3, at 207 bar (3000 psi)
Adjustment Torque Required: 1.7 Nm (15 inch-pounds) at 207 bar (3000 psi)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
   -54° to 107°C (-65°F to 225°F) with Polyurethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-3; See page 9.112.1_3w
Cavity Tool: CT12-3xx; See page 8.600.1
Seal Kit: SK12-3x-MM; See page 8.650.1
Knob Kit: Part No. 6113160

FR12-33 Flow vs. Pressure

FR12-33 Flow vs. Turns   DIMENSIONS:

FR12-33 Valve Dimensions


Cartridge: Weight: 0.34 kg.
(0.70 lbs.); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and polyester elastomer back-ups standard.

Standard Ported Body: Weight:
0.98 kg. (2.15 lbs.); Anodized high-strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi); Ductile
iron bodies available; dimensions
may differ. See page 8.012.1_3w

FR12-33 Ordering

Selection guide - similar valves.
PDF file of this page. STP file for FR12-33 Request a quote.