Check valves

 

CHECK VALVES 

 

APPLICATION:

Check valves are designed to allow the fluid to flow in only one direction in systems using:

                                          - cold and hot industrial water;

                                          - drinking water;

                                          - oil products, etc.

 

DESIGN AND SIZE CHARACTERISTICS:

- overall length: EN, ISO, ANSI

- connection flanges: EN, ISO, DIN, ANSI

- max. flowing speed for liquids: - 3 m/s - for PN 10

                                                            - 4 m/s - for PN 16

- design versions:  - with free shaft;

                                  - with counterweight;

                                  - with hydraulic damper and counterweight.

 

SEATS:

- body  - disc: DN50 ÷ 800 - Ac / Ac – all copper alloy

              - Ix /I x – all min.11.5% Cr stainless steel DN50 ÷ 400

             - C / Ac - rubber / copper alloy

              - C / Ix - rubber / min. 11.5%Cr stainless steel

              - C / Fc (C / Fgn) – rubber / cast (ductile) iron

- body – bonnet: - asbestos-free sheet

- body – shaft: teflon strip for the free shaft design

- “O” - rings for the counterweight design and the counterweight and hydraulic damper design.

 

MOUNTING:

- flow direction – marked with arrow on body;

- mounting position – on horizontal pipelines;

                               – on rising vertical pipelines.

NOTE:  - mounting position shall observe the unique flow direction marked with arrow on body.

            - the valves with counterweight and damper will be mounted only on horizontally pipe

 

FACTORY TESTS; TESTING PRESSURES; LEAKAGE:

- hydraulic tests - in acc. with ISO 5208

                              - in acc. with MSS-SP-71

- testing pressures - shell - 1.5xPN

                                   - seat - 1.1xPN

- max. allowed leakage at seat test: - in acc. with ISO 5208

                                                                - in acc. with MSS-SP-71

 

PRODUCTS:

 

- CHECK VALVES

- SWING CHECK VALVES PN10 DN 300 ÷ 800, PN16, DN50÷800

- SWING CHECK VALVE WITH COUNTERWEIGHT AND HYDRAULIC DAMPER PN10 DN 300÷800; PN16 DN 50÷800

- SWING CHECK VALVE ANSI TYPE CLASA 125; 150, DN 2"÷12"

- BALL CHECK VALVE PN16, DN50÷250

- BI-ECCENTRIC BUTTERFLY CHECK VALVES PN16 DN200÷1000

- LIFT CHECK VALVE PN16 DN15÷300

- STRAINERS PN6 DN15÷200, PN16 DN15÷300