Pressure Control Valves

RV50-26 — Relief, Pilot-Operated, High Pressure, Spool Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for RV50-26
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RV50-26 Valve

U.S. Patent 7,137,406

RV50-26 Valve symbol


A screw-in, cartridge-style, pilot-operated, two-stage, spool-type hydraulic relief valve, intended for
use as a pressure limiting device in demanding hydraulic circuits which require fast response and
low hysteresis at high operating pressures.

The RV50-26 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the pilot relief off
its seat, allowing the main stage to shift, opening 1 to 2. The cartridge offers smooth transition in
response to load changes in demanding hydraulic circuits
Note: The RV50-26 cannot be used in cross-over relief applications (back pressure on 2).

• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened spool and cage for long life.
• Rapid, smooth response to pressure changes.
• Industry-common size.

Operating Pressure: 345 bar (5000 psi) maximum
Flow: up to 113.6 lpm (30 gpm); the performance chart illustrates flow handling capacity
   at maximum setting. Pressure rise will vary with setting due to flow forces.
   Consult factory for specific flow characteristic values.
Internal Leakage: 115 cc/minute (7 cu. in./minute) max. to 85% of nominal setting
Crack Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Relief Pressure Range: 20.7 to 344.7 bar (300 to 5000 psi) Spring range shown in the
   To Order section. Due to manufacturing tolerances, it may be possible to adjust the valve
   either lower or higher than the nominal rating shown. If the valve is adjusted beyond the
   recommended maximum pressure range for the F and H style adjuster options, the valve
   may not open to relieve system pressure.

Cycle Life: 500,000 cycles at 241.3 bar (3500 psi)

Temperature: -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: VC10-2; See page 9.110_2w
Cavity Tool: CT10-2xx; See page 8.600.1
Seal Kit: SK10-2X-B with polyurethane seals; SK10-2U-0 with urethane seals; See page 8.650.1




RV50-26 Flow-Pressure



RV50-26 Valve Dimensions



Cartridge: Weight: 0.24-0.29 kg (0.53-0.65 lb) depending on adjust-ment option Steel with hardened work surfaces. Zinc-plated exposed surfaces. Polyurethane seals with Fluorocarbon back-ups for pressures over 240 bar (3500 psi). Anodized aluminum knobs.

Ported Body: Weight: 0.54 kg (1.2 lb) Ductile Iron (code "D") standard, consult factory for weight, dimensions may differ. Rated to 345 bar (5000 psi). See page 8.010_2w.

Adjustment Option Details:
See page 6.003.1



RV50-26 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for RV50-26 Request a quote.