Pressure Control Valves

RV10-28 — Relief Valve, Pilot-Operated, with
Reverse Flow Check
  Selection guide - similar valves.
  PDF file of this page.
  STP file for RV10-28.
  Request a quote.
RV10-28 Valve

U.S. Patent 7,069,945 and 6,805,155

RV10-28 Valve symbol

A screw-in, cartridge-style, pilot-operated, two-stage, hydraulic relief valve with reverseflow check
valve. It is intended for use as a pressure limiting device in demanding hydraulic circuits which
require fast response, low hysteresis, low leakage, low pressure overshoot and reverse free flow

The RV10-28 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the pilot stage
open, allowing the main stage to shift, opening 1 to 2.
The relief flow path is from 1 to 2. Reverse flow, from 2 to 1, occurs when the pressure at port 2 is
at least 2.1 bar (30 psi) higher than at port 1.

• Variety of adjustment options; adjustments cannot be backed out of the valve.
• Can be operated in relief valve mode or check valve mode.
• Several pressure ranges available.
• Hardened spool and cage for long life.
• Fast response.
• Industry-common size.

RATINGS: Relief Valve Mode
Operating Pressure: 289.6 bar (4200 psi)
Proof Pressure: 620.5 bar (9000 psi)
Burst Pressure: 1241.1 bar (18000 psi)
Flow: Port 1 to 2; 113.6 lpm (30 gpm)
Adjustable Pressure Range: 13.8 to 289.6 bar (200 to 4200 psi) Shown in To Order section. Due to
   manufacturing tolerances, it may be possible to adjust the valve either lower or higher than the nominal
   ratings shown. If the valve is adjusted beyond the recommended maximum pressure range, the
   valve may not open to relieve pressure.

Internal Leakage: 0.53 ml per minute (10 drops/minute) max. to 80% of nominal setting
Crack Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Pressure Rise: at 240 bar (3500 psi): 0.15 bar per lpm (8 psi per gpm)
Response Time: Relief to Check switch under 250 bar/53 lpm (3500 psi/14 gpm): 0.6 sec.

RATINGS: Check Valve Mode
Crack Pressure: 2.1 bar (30 psi)
Response Time: Relief to Check switch under 250 bar/53 lpm (3500 psi/14 gpm): 0.3 sec.

RATINGS: Overall

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 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, Variation "A"; See page 9.110_2w
Cavity Tool: CT10-2xx; See page 8.600.1
Seal Kit: SK10-2x-M; See page 8.650.1


RV10-28 Flow-Pressure

RV10-28 Valve Dimensions


Cartridge: Weight: 0.59 kg. (0.27 lbs.) Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings and polyester elastomer back-ups standard. Optional polyurethane seals recommended for pressures over 240 bar (3500 psi).

Standard Ported Body:
Weight: 0.16 kg. (0.35 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to
207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.
See page 8.010_2w.

Adjustment Option Details:

See page 6.003.1

RV10-28 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for RV10-28 Request a quote.