Directional Valves

CV08-21 — Check Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for CV08-21.
  Request a quote.

CV08-21 Valve

SYMBOL:
CV08-21 Valve symbol

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

OPERATION
The CV08-21 allows flow passage from 2 to 1, while normally blocking flow in the opposite direction.
The cartridge has a fully guided check which is spring-biased closed until sufficient pressure
is applied at 2 to open to 1.

FEATURES
• Hardened seat for long life and low leakage.
• Fully guided poppet.
• Compact size.

RATINGS
Operating Pressure: 241 bar (3500 psi)
Flow: Up to 30 lpm (8 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
Standard Bias Spring at Crack: 2.1 bar (30 psi) nominal. Actual cracking pressure may vary
   from 1.9 to 2.8 bar (27 to 40 psi); valves which are not actuated for a period of time may
   initially crack at higher than subsequent cracking pressures.
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals
Filtration: Recommend 25µ nominal or better; 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: VC08-2; See page 9.108.1_2w
Cavity Tool: CT08-2xx; See page 8.600.1
Seal Kit: SK08-2x-B; See page 8.650.1

PERFORMANCE:

CV08-21 Valve Performance Chart
  DIMENSIONS:CV08-20 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.05 kg (0.12 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and back-ups standard.

Standard Ported Body: Weight: 0.16 kg (0.35 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.
See page 8.008.1_2w.
  ORDERING CHART:

CV08-21 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for CV08-21 Request a quote.