PRIORITY FLOW REGULATOR WITH BUILT-IN RELIEF VALVE U.S. PATENT No. 7,063,100
Frrv12-41f/x is a screw-in, cartridge type, combination valve. It includes a pressure compensated, non adjustable priority type flow regulator and a pressure relief valve
Operation
With inlet at port 1, it maintains a constant flow rate from port 3 regardless of load pressure changes at priority port 3 or bypass port 2. When the load in priority line exceeds preset value, the valve relieves pressure to port 4
Features
Two valve functions in one, industry-common cavity.
Adjustments cannot be backed out of the valve.
Relief valve adjustments prohibit relief valve spring from going solid.
Quiet, modulated response.
Hardened parts for long life.
Fluids:
Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid Viscosity Range:
7.4 to 420 cSt
Maximum Operating Contamination Level:
18/16/13 per ISO 4406
Unit Weight:
0.43 kg (0.95 lb) Frrv12-41f/a
0.45 kg (1.00 lb) Frrv12-41f/b
0.48 kg (1.05 lb) Frrv12-41f/c
0.42 kg (0.92 lb) Frrv12-41f/f
0.42 kg (0.92 lb) Frrv12-41f/h
0.48 kg (1.05 lb) Frrv12-41f/l
Internal Wetted Surface Area:
379.9 cm² (58.88 in²)
Materials
Cartridge: Weight: 0.43 to 0.48 kg. (0.95 to 1.05 lbs.) depending on option selected; Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and polyester elastomer back-ups standard. Anodized aluminum knobs and caps.
Standard Ported Body: Weight: 1.5 kg. (3.3 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ. For Pressure Adjustment option details, see adjustment options