The R-K DDV series direct operating diaphragm valve features a compact thermoplastic valve designed for most harsh chemicals, DI water and high purity applications.

  Double diaphrams (primary: Teflon, back-up: reinforced EPDM).

  Pneumatic control to open and spring to close

  No Metal contact with fluid

  High Cv rating

  Direct acting full flow with top entry for easy maintenance and minimum water hammer. The standard   valve is normally closed (apply air to open). Normally open valve is also available upon request.
  Suitable for most harsh chemicals, DI water and other high purity applications.

Operating Pressure Range       10 to 100 PSIG     

Air actuating pressure             25 to 80 PSIG

Material           ValveBody        PVC Type 1, Grade 1

                                    Polypropylene
                                    PVDF
                                    Teflon
                   Diaphragm        Primary: Teflon
                                    Back-up: EPDM
                     Seal           EPDM
                                    Viton(R)
                                    Kalrez(R)



Temperature Range                0 F to 140 for PVC
                                 0 F to 180 F for POLYPRO
                                 0 F to 280 F for PVDF
                                 0 F to 340 F for TEFLON


Valve ports                      1/4" to 1" Valve FNPT
                                 All valves are fully ported

 



Mounting Method                  (4) 1/4" -20 tapped holes
                                 standard machine valve body.
                                 (1/4" only)
                                 (2) cut-out slots on molded
                                 valve body (1/2" to 1.00")