PRODUCT TYPE: CV08-21, Poppet Type, Directional Control, Hydraulic cartridge check valve
APPLICATION: To Hydraulic Blocks or Manifolds
CONNECTION TYPE: Threaded, Screw-in Connection
PART NOS.: FT-CV08 Series
Valve Cavity: Below
Valve Housings:
– Check cartridge style design for industrial cavity
– Zero oil leak in one direction
– Poppet sealing, more reliable for pressure keeping

CV08-21 Poppet type, screw-in style, hydraulic cartridge check valve is free flow in one direction, it is called one way check valve in some occasion. The check valve connected with cavity with cartridge design, there are Metric, BSP or SAE threaded available, standard or customized.

Finotek CV08-21  cartridge check valve is tested the connection threads by ISO standard threaded ring gauge, making sure all of the threads is suitable to industrial cavity at customer side. The surface of CV08-21 cartridge check  valve style is treated with zinc plated or black galvanization as to avoid rust with corrosion resistant for moist working environment. The internal parts are made from high strength carbon steel and hardened treatment for long service life.

CV08-21 Cartridge check valve Ordering Code

Example (Normal code): “FT-CV08-21-N-25 ” Explanation As Below:

FT- CV08-21 N 25
(1) (2) (3) (4)

(1) Supplier = By Finotek
(2) Valve Type =CV08-21, Poppet Type, Screw-In Style, Hydraulic cartridge check valve
(3) Seals: N= Buna (Std.) ; V= Fluorocarbon

(4) Bias Spring:
5 = 0.3 bar (4 psi) ; 10 = 0.7 bar (10 psi)
15 = 1.1 bar (16 psi) ; 20 = 1.3 bar (20 psi)
25 = 2.8 bar (40 psi) ; 30 = 3.5 bar (51 psi)
35 = 5.7 bar (83 psi) ; 40 = 10.4 bar (150 psi)

CV08-21 Cartridge check valve Technical Information

Working Operation Pressure: 315bar(4568psi)
Proof Pressure: 350 bar (5075 psi)
Inner Leakage: Less than 0~0.30cc/min. (2 drops/min.) max. at 210 bar
Working Tem.:  -30oC to +120oC
Standard Crack  Of Bias Spring: 0.3 bar (4 psi); 0.7 bar (10 psi); 1.7 bar (25 psi); 4.1 bar (60 psi)

Media Temperature: -30 to +80(°C)for NBR O-rings
Body/Housing Material:
Anodized 6061-T6 Aluminum alloy for pressure of 210bar(3045psi)
Oil Medium: Mineral oil as per DIN51 524, VDMA 24 568 or rapeseed oil, Viscosity 10 – 400 CST
Recommended Medium Filtration: ISO 4406 Standard, cleanliness class:20/18/15

CV08-21 Cartridge check valve Symbol


CV08-21 Cartridge check valve Flow Performance

CV08-21 Check Cartridge Valve Structure operation curve

CV08-21 Cartridge check valve Cavity