Check valves
Submitted by admin on Tue, 05/08/2018 - 21:27
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:
- 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
