Stop-Check Valve Type 19.1

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Stop-Check Valve Type 19.1

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TECHNICAL DATA
INFO FORM

Stop-check-valve with spring in straight type, y-type or corner-type; with flanges or buttweld ends and safety gland packing; can be supplied in carbon steel 1.0619 / WCB, stainless steel 1.4408 / CF8M, low temperature carbon steel 1.6220 / LCB / LCC and special materials.

Best for installation after pumps.

Operating mode

The stop-check valve combines the functional characteristics of a check valve with those of a bellows sealed globe valve. Only one valve is needed in a section where previously two valves had to be used. If the valve stem is in the open position (hand wheel in upper position), the valve works like a conventional check valve; the medium can move in the flow direction; the plug closes in the event of backflow. Spring loaded plug holds the valve in closed position so that the valve can be mounted in any position. If the valve stem is in the closed position (hand wheel in lower position), the valve works like a conventional stop valve; the plug remains closed with flow from any direction.


Non-Return Valve Function: Stem in open position; plug at the top, medium flows in flow direction.	Non-Return Valve Function: Stem in open position; plug closes in the event of backflow.	Stop Valve Function: Stem in closed position; plug seals tight.