Pressure Control Valves

RV12-26 — Relief Valve, Pilot-Operated, Spool-Type Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for RV12-26.
  Request a quote.

RV12-26 Valve

SYMBOL:
RV12-26 Valve symbol

DESCRIPTION
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.

OPERATION
The RV12-26 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 RV12-26 cannot be used in cross-over relief applications.

FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened spool and cage for long life.
• Optional spring ranges to 240 bar (3500 psi).
• Rapid, smooth response to pressure surges.
• Cost-effective cavity.

RATINGS
Operating Pressure: 240 bar (3500 psi) maximum
Flow: up to 170 lpm (45 gpm)
Internal Leakage: 197 ml/minute (12 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
Standard Spring Ranges: 6.9 to 27.6 bar (100 to 400 psi);
   13.8 to 110.3 bar (200 to 1600 psi); 31.0 to 206.9 bar (450 to 3000 psi);
   34.5 to 241.4 bar (500 to 3500 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 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.

Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon 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: VC12-2; See page 9.112_2w
Cavity Tool: CT12-2xx; See page 8.600.1
Seal Kit: SK12-2x-B; See page 8.650.1


PERFORMANCE:



RV12-26 Flow-Pressure


DIMENSIONS:
RV12-26 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.34 kg (0.75 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-up standard. Anodized aluminum knobs.

Standard Ported Body:
Weight:
0.57 kg (1.25 lb); Anodized high-strength aluminum alloy, rated to 207 bar
(3000 psi); Ductile iron bodies available; dimensions may differ.
See page 8.012_2w.

Adjustment Option Details:

See page 6.003.1
  ORDERING CHART:

RV12-26 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for RV12-26 Request a quote.