Home > Products > New product > Water-sealed gate valves
Water-sealed gate valves
- 0 Unit / Units per Month
- T/T L/C D/P D/A
- 7 days
Product Description
Water-sealed gate valves
What is gate valve?
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, so gate valves are often used when a straight-line flow of fluid and minimum restric?tion is desired. 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.
Gate valves are characterized as having either a rising or a nourishing stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nourishing stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nourishing stems are used underground or where vertical space is limited.
Bonnets provide leak proof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.
Another type of bonnet construction in a gate valve is pressure seal bonnet. This construction is adopted for valves for high pressure service, typically in excess of 15 MPa (2250 psi). The unique feature about the pressure seal bonnet is that the body - bonnet joints seals improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.
Gate valves may have flanged ends which are drilled according to pipeline compatible flange dimensional standards. Gate valves are typically constructed from cast iron, ductile iron, cast carbon steel, gun metal, stainless steel, alloy steels, and forged steels.
Water sealed gate valve Characteristics:
1. S/Y Water sealed gate valve series usually use double disks and bi-directional flexible seal, open and close nimbly,reliable for seal.
2. Have simple in structure, compact reasonable, examine and repair conveniently,gate valve operation life long
3. Be used for on and off device on the pipe and must be full open and full closed, can not be used for regulate flow.
4. Gate valves The connection type are flanged and welded, actuator are gear/handle and electrical
Gate valve Design and manufacture standard:
Design and manufacture:GB12234
Flange size: GB9113 JB7490
Pressure and temperature: JB/T74 GB9131
Welded size:-
Test and inspection: JB/T9092 GB13927
Gate valve Main Function Specification;
Contact Us
- Zhongrui International Limited
- Contact nameada ge
- Phone86-21-66306961
- Address Linyi,Shandong
New product |
- sealing oil floater tank float valve FY-40 for power generation
- Sinro Motorized Valve SR04GB32046B4 for power station
- servo valve G761-3034B for power plant
- Bare Stem Fluorine Lined Butterfly Valve
- Alpha split isolated valve ABvalve OEB5level
- AlphaAB valve split butterfly valve
- AB valve Split Isolated Valve split butterfly valve
- Manual Operated Wafer Type PTFE Lined Butterfly Valve
- Pneumatic PTFE Lined Diaphragm Valve
- solenoid valve 22FDA-F5T-W220R-20 for thermal power plant
- solenoid valve J-110VDC-DN10-Y/20H/2AL for power generation
- ealing oil float tank float valve BYF-40 for power station
- Air transfer chute three-way to curved four-way distributor valve
- B500 Air chute pneumatic closure valve Inflatable manual plugboard valve
- Aseptic transfer αβ Valve manufacturer sealed feeding powder transfer AB valve
- Manufacturer of high activity powder transfer AB valve split type butterfly valve
- makeup water solenoid valve K25FJ-1.6PA2 for power generation
- AST/OPC solenoid valve 0508.919T0301.AW027 for power plant
- X43T-10Cast iron copper core two-way flanged plug valve
- PTFE Lined Globe Valve
- Stainless steel AB valve split type butterfly valve manufacturer Alfa Technology
- AB valve manufacturer split type butterfly valve Alfa Technology
- Manufacturer of high activity sealed feeding AB valve αβ valve
- PTFE Lined Butterfly Wafer Type Check Valve
Popular Searches
Find Similar Products By Category
- Mechanical Parts & Fabrication Services > Valves
- Buy on GoldSupplier.com
- How to Buy
- Browse by Catagories
- Browse by Hot Regoins
- Private Sourcing Events
- Sell on GoldSupplier.com
- How to Sell
- Post Products
- Manage Products
- Manage Groups
- About
- About Us
- Link to Us
- Contact Us
- Sitemap
- Please Enter your Email Address
- Please enter the content for your inquiry.
We will find the most reliable suppliers for you according to your description.
Send Now-
ada ge
Welcome to my shop! Glad to serve you!Please send your question!
Your message has exceeded the limit.
Your message has exceeded the limit.
-
-
Your inquiry content must be between 20 to 5000 characters.Send Now.
-
Please input the mailbox.
-