A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Typical gate valves should never be used for regulating flow, unless they are specifically designed for that purpose. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening. This means that flow rate does not change evenly with stem travel. Also, a partially open gate disk tends to vibrate from the fluid flow. Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow. Typical gate valves are designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.
|
Serial no. |
part |
material |
|
1 |
Body |
Grey cast iron, ductile cast iron, cast steel |
|
2 |
Disc |
Ductile cast iron packed with rubber or EDPM outside |
|
3 |
Bolt |
Carbonized treatment |
|
4 |
Gasket |
Buna-N rubber or EPDM |
|
5 |
Cover |
Grey cast iron, ductile cast iron, cast steel |
|
6 |
Stem |
Stainless steel |
|
7 |
O-ring |
Buna-N rubber |
|
8 |
Thrust bearing |
Gun metals |
|
9 |
Bolt |
Carbon steel or alloy |
|
10 |
Gland |
ductile cast iron, cast steel |
|
11 |
Dust proof gasket |
Buna-N rubber |
|
12 |
Hand wheel |
Ductile iron |
Shanghai ThinkTank Process Management Co., Ltd. is the sole production and R&D institute of Taiwan STONE Company in Mainland China. ThinkTank entered Chinese market in 2002 and moved from Hangzhou to Shanghai headquarter in 2012. Based on over 30 years experience in researching and manufacturing automatic instruments, brining in overseas advanced technology and combining domestic users real working situation, ThinkTank is specialized in producing new typed self-regulating valves, control valves and various kinds of automatic instruments. ThinkTank's business includes engineering projects such as electricity, metallurgy, petrochemical processing, light industry and building materials, municipal water service and natural gas.
Enterprise history
1985.08 Taiwan STONE company was established in Taipei city.
1990.02 Sales network covered Southeast Asia.
2002.06 Branch office was fund in Hangzhou, Zhejiang, handling all business in China
2012.10 Mainland head office was moved to Pudong, Shanghai
Shanghai ThinkTank Process Management Co., Ltd. Has a professional team works for control valves design and engineering application. ThinkTank develops a series of hi-tech products after absorbing overseas advanced technology and innovating.
*New self-regulating, micro pressure, differential pressure, flow, temperature control valve
*New pneumatic (electric) linear actuator (low dB, high pressure) control valve
*Pneumatic (electric) rotary actuator (O/V ball, butterfly) control valve
*Pneumatic (electric) special corrosion resisting control valve
Shanghai ThinkTank Process Management Co., Ltd sticks to the policy of "client oriented, quality comes first, and faith is root". Depending on many years experience on engineering application in various industries, ThinkTank provide clients with good, reliable full service, focusing on maximizing the rate of return on investment for clients.
