Sion-foreign Joint Venture Zhejiang CTV Valve Co.,Ltd.

The wafer flange clamped butterfly check valve is a energy-save

product.It is manufactured based the foreign advanced technology and in

accordance with relative international standards.This product is

featured by excellent retaining per-formance,high safety and reliability

and low flow resistance.It is suitable for systems in the industries of

petrochemical food processing,medicine,textile,paper-

making.Water,supply,drainage,metallurgy,energy,and light

industry,etc,used as a check valve in one way.
Standerds compliance
Design and Manufacture: ANSI B16.34,API 6D
Face to face: API 6D
Flanged connection: 2~~24~to ANSI B16.5
22~,26~~36~to MSS-SP-44 to API 605 on request
Test and inspection: API 6D
Shell test 150Lb 450 PSI
300Lb 1125 PSI
Seat test 150Lb 315 PSI
300Lb 815 PSI(Hydrostatis
c)80PSI(Air)
Featutes
1.Small in size,light in weight,compact in structure,easy in

maintenance.
2.Two torsion springs are used excerting on each of the pair valve

plates.Which close the plates quickly and automatically.
3.The quick-close action prevents the medium from flowing back and

eliminates water-hammer effect.
4.This valve is short in length,so that it is rigid and easy to mount.
5.It is easy to install on pipeline which is laid horizontally or

vertically.
6.This valve is tightly sealed without leakage under the pressure water

test.
7.Safe and reliable in operation,high interference-resistance.
8.The connection dimensions of flanges accord with the standards of

GB4216-84 GB4216.84
9.The face to face dimensions are in accordance with GB12221-89.ISO5752

-82.The stem of the valve should be perpendicular to the horizontal

level when the valve is mounted on horizontal pipeling.For vertical

installation the direction of flow should be downward.