Non Return Valves

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Non Slam Non Return Valve

When the valve closes urgently, it prevents flowing backward by closing valve automatically without external force.
If disc closes approximately 80%, it prevents water hammering effectively by reducing closing speed.

Non Slam Check Valve Hydraulic Operation with Count Weight

Non Slam Check Valve Triple Offset Zero Leakage 4”~160”

Application

– Water works
– Power plant
– Sewage plant
– Heating and ventilation
– Desalination plant
– Air conditioning- Gas plant
– Chemical industry etc.
– Shipbuilding industry
– Irrigation

Production Range

– Size : DN 80 to DN2400 (3 inch to 96 inch)
– Working Pressure : Up to 30 bar
– Working Temperature : -20°C ~ + 160°C

Connection Flange

– BS4504 PN10, PN16 /DIN2501, PN10, PN16 ANSI B 16.1 CL.
125LB & B16.5 CL 150LB
– MSS SP 44 CL 150LB
– AWWA C207 Class D & E
– ISO 2531 PN10 PN16 / KS/JIS 10K,
16K, and 20K

Face to Face Dimensions

– Conform to BS5155, ISO 5752, AWWA C504, KS 2333

Material

– Body : Cast Steel, Ductile Cast Iron, Stainless
Steel, Aluminium Bronze
– Disk : Cast Steel, Ductile Cast Iron, Stainless
Steel, Aluminium Bronze
– Stem : Stainless Steel, Monel, Inconel
– Seat: Rubber(EPDM, NBR, NR, FPM) Graphite, Stainless Steel
– Acc’y : Dash pot (Cushion Cylinder) Weight.

Combined Non Return Valve

Emergency valve can control the flow direction in order to prevent the breakage of pipes by the reverse flow due to the sudden rising of the flow speed(water hammering).
When ordered by control device. The closing speed of the valve disc can be adjusted.

Operation

– Opening valve
– Closing valve
– Keeping the valve open at the intermediate position
– Emergency self-closing
(adjustable disc closing time by two steps-site adjustment available)

Features

– Emergency valve can be substituted for butterfly valve & check valve.
– Control the flow by keeping the valve open at the intermediate degree.
– Adjustable the disc closing speed by two steps. When the valve close by position to prevent
(can be closed slowly at the 85 degree closing position to prevent water hammering)
Can be closed quickly be emergency situation to prevent the reverse flow as general check valve usage.
– The cost of the installation and maintenance can be reduced.
– Free from shaking and noise.

Flap Valve

Nonmetallic Flap Valve

Nonmetallic Flap Valve