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NON-RETURN VALVES

NON-RETURN VALVES
   
    

Non-return valves with nominal pressure ratings up to PN 420 bar:

- with tube connection both ends:

RHD

- with tube connection to male stud:

RHV/RHZ

- with female thread both ends:

RHDI

- valve cartridges:

RVP

- valve internal parts:

ITL

 Leakage rate hydraulic testing under test pressure: 1 drop per minute.

Characteristics:
Poppet check valve with a 90° seat with an elastomere sealing disc. Poppet stop for controlled valve opening. Damped opening action to minimize shock and noise. No reduction of cross section. Maximum shock velocity not more than 8 m/sec (for higher flow velocities special tests are required) Sealing of male stud thread by Eolastic soft seal with types RHV and RHZ).

Opening pressure:
Standard 1 bar (on request also 0.2, 0.5, 2, 3, 4, 5 and 6 bar are available). Cracking pressure tolerance: ± 20%.

Material:
- Steel zinc-plated (A3C) or CF chromium6-free), seals in NBR (e. g. Perbunan) or FKM (e. g. Viton®) on request.

- Stainless steel valves have FKM (e. g. Viton®) as standard. (Up to 3 bar cracking pressure)

- Brass valves (CuZn35Ni2 2.0540) with internals (1.4571) available on request. (Up to 3 bar cracking pressure)

Media:
Hydraulic oil, low flammability hydraulic fluids, excent for types HFC: for HFD types; FKM seals are neccessary). Please indicate on order if used with compressed air. Not suitable for steam, combustible/explosive gases, or oxygen. For water applications, please consult Parker with details of water and any additives.

 

 

 


 
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