– The products have passed ISO9001 and CE certification.
– The valve life is guaranteed for 5 years.
– We provide one-stop sourcing service for you.
– The dozens of series of ball valves, butterfly valves, electric actuators, pneumatic actuators, and accessories.
COVNA company main produce: Globe Valve
1. The opening and closing member of the shut-off valve is a plug-type valve flap with a flat or tapered surface on the seal, and the valve flap moves linearly along the center line of the valve seat. The movement of the valve stem, as well as the lifting and rotating rod type, can be used to control the flow of air, water, steam, and various corrosive fluids.
2. Suitable for cutting, adjusting and throttling conditions. The valve stem has a relatively short opening or closing stroke and a reliable shut-off function. The change of the valve seat opening is proportional to the flap travel, which is suitable for adjusting the flow.
3. The electric stop valve is tight and reliable, and the sealing surface material is widely used in plastic, and the sealing property is good. It has also been widely used in vacuum systems.
4. It is easy to operate, and it can be opened and closed quickly. It only needs to be rotated 90° from full opening to full closing, which is convenient for remote control.
5. Easy maintenance, simple structure, the sealing ring is active, easy to disassemble and replace.
6. Wide range of applications, through a few millimeters, up to a few meters, high vacuum and high pressure conditions can be used.
Strucure feature and usages
1. When fully closed,handwheel rotates clockwise.
2. Able to be mounted to any position of the pipeline,the medium flows from down to up.
3. Stainless steel made globe valve is of good anti-corrosive property and enough strength and suitable for various pipelines with corrosive medium.
4. Alloy steel made globe valve features high-temperature resstance,suitable for high-temperatue steam and oil goods pipeline.
Standard for design and manufacture
1. Design manafacfure according to GB/T 12235-2007
2. Flange dimension according to JB/T 79-94
3. Valve check and test according to GB/T 13927-2008
Test pressure
| Test pressure | ||||||
|---|---|---|---|---|---|---|
| Nominal pressure( MPa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| Shell stength test | 2.4 | 3.75 | 6.0 | 9.6 | 15 | 24 |
| Back seal test | 1.76 | 2.75 | 4.4 | 7.04 | 11 | 17.6 |
| Seal test (Mpa) | 1.76 | 2.75 | 4.4 | 7.04 | 11 | 17.6 |
Applicable
| Product type | Suitable medium | Suitable medium |
|---|---|---|
| J41-C type, J941-C type | Waler, steam, oil goods | ≤425℃ |
| J41W-P type, J941W-P type | Nitric acid | ≤200℃ |
| J41W-R type, J941W-R type | Acetic acid | ≤200℃ |
| J41Y-I type, J941Y-I type | Water,steam,oil goods | ≤550℃ |
Material for main parts
| Part name | J41-C type, J941-C type | J41W-P type, J941W-P type | J41W-R type, J941W-R type | J41Y-I type, J941Y-I type |
|---|---|---|---|---|
| Body, Bonnet | 25.WCB | Gr.Ni.Ti.steel | Gr.Ni.Ti.steel | Gr.Mo.steel |
| Valve stem | Gr.Stainles steel | Gr.Ni.Ti.steel | Gr.Ni.Ti.steel | Gr.Mo.steel |
| Disc | 2Cr1325 | Gr.Ni. Ti.steel | Gr.Ni. Ti.steel | Alloy steel |
| Sealing face | H: Stainless steel, Y: Co-based carbidealloy steel | Gr.Ni.Ti.steel | Gr.Ni. Ti.steel | Co-based carbidealloy steel |
| Yoke nut | ZQA19-4 Al bronze | ZQA19-4 Al bronze | ZQA19-4 Al bronze | ZQA19-4 Al bronze |
| Packing | Flexible graphite | Flexible graphite | Flexible graphite | Flexible graphite |
| Fastener | High-grade carbon steel | Stainess steel | Stainess steel | Alloy steel |
| Handwheel | Forgeable cast-steel | Forgeable cast-steel | Forgeable cast-steel | Forgeable cast-steel |
COVNA company main produce: Globe Valve
