Water Seal Gate Valve

Water seal Gate Valve are mainly suitable for applications requiring isolation from the atmosphere of the system piping.Water seal gate valve able to applied for nominal pressure 100MPa working temperature of 425 ° C services, the working medium is water, steam, oil and non-corrosive gas pipeline open and close devices, especially for thermal power plant turbine vacuum condensation system.

Features 

1.A water seal gate valve has simple structure, it is compact and reasonable, easy maintenance, examine and repair conveniently, operation with long service life.

2. SWZ Series water seal gate valve with the flexible double plate two-way elastic sealing flexible, open and close quickly, reliable sealed.

3. The way of the tube for opening and closing device must be in the fully open or fully closed state, this valve can not be used to regulate flow.

4. The connection type of water seal gate valve are flanged and welded, valve actuator are gear/handle and electrical.  

5. Full port, outside screw and yoke(OS&Y), Bolted Bonnet, Rising stem.

6. Packing chamber with 0.6Mpa water seal structure, system isolation from air, air seal well.

Standard and scope:

Design and manufacture: GB12234, API,

Flange size: GB9113, JB7490, API, DIN, BS EN,

Pressure and temperature: JB/T74, GB9131, ASME B 16.34

Welded size: ASME B16.1

Test and inspection: JB/T9092, GB1392

Main Function Specification

Nominal pressure（MPa）
Shell test	1.0	1.6	2.5	4.0	6.4	10.0
Seal test	1.5	2.4	3.8	6.0	9.6	15.0
Back seat seal test	1.1	1.8	2.8	4.4	7.0	11.0
Gas Seal Test	1.1	1.8	2.8	4.4	7.0	11.0
Suitable range
Model	Temperature（℃）			Suitable medium
Carbon steel series	≤425			Water, steam, oil and Non-caustic gas
Alloy series	≤540

 Main Parts Material List

Model	Part Name
	Body ,Bonnet and York	Stem	Plate, Disc and Seal face	Seat Seal face,	Stem Nut	Packing
Carbon steel series（C）	WCB	1Cr13 or 2Cr13	Cr13serise stainless steel or hard alloy	Stainless Steel	Aluminum Bronze	Soft Graphite
Alloy series（I）	WCB Cr5Mol	20Cr1Mo1VA	Co-Alloy	Hard Alloy	Aluminum Bronze	Soft Graphite