Directional Valves

CV12-21 — Check Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for CV12-21.
  Request a quote.

CV12-21 Valve

CV12-21 Valve symbol

A screw-in, cartridge-style, hydraulic check valve for use as a blocking or load-holding device.

The CV12-21 allows flow passage from 2 to 1, while normally blocking flow from 1 to 2. The cartridge has a fully guided check which is spring-biased closed until sufficient pressure is applied at 2 to open to 1.

Hardened seat for long life and low leakage.
Optional bias springs for back-pressure application flexibility.
Low check mass for anti-cavitation applications.
Cost-effective cavity.

Operating Pressure: 241 bar (3500 psi)
Flow: Up to 114 lpm (30 gpm)
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. at 240 bar (3500 psi)
Crack Pressure Defined: Gauge psi evident at 2 at 16.4 cc/minute (1 cu. in./minute) attained at 2
Standard Bias Springs at Crack: 0.4 bar (6 psi); 1.8 bar (26 psi); 3.8 bar (56 psi)
Temperature: -40 to 100C (-40 to 212F) with Buna seals;
-26 to 204C (-15 to 400F) 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: See dimension drawing for minimum pilot drill diameter; See page 9.020.1
Cavity: VC12-2, Variation 'A'; See page 9.112.1_2w
Cavity Tool: CT12-2xx; See page 8.600.1
Seal Kit: SK12-2x-B; See page 8.650.1


CV12-21 Valve Performance Chart

CV12-21 Valve Dimensions


Cartridge: Weight: 0.18 kg. (0.40 lbs.);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups standard.

CV12-21 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for CV12-21 Request a quote.