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Flanged Gate Valves

Flanged gate valves, also known as flanged sluice valves, are mainly used for permitting or preventing the flow of liquids in pipelines. Kayson’s valves have passed API 6D / CE certification. And those API 6D gate valves are widely applied in the fields of tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, energy system, etc.

1. Small flowing resistance. Because fluids in flanged gate valves are often flowing in a straight-line direction.
2. Easy to open and close, and convenient to install.
3. Very low frequency of water hammer phenomenon.
4. Higher in price than check valves. Because flanged sluice valves have a lot of parts, and sealing surfaces are complicated to process.
5. Small opening torque.
6. High corrosion resistance.
7. Smooth and fine in appearance.

1. Hand wheel, handle, and transmission structure of flanged gate valves cannot be lifted.
2. Dual gate valves should be installed vertically, that’s to say, the stem is in vertical direction and handle wheel is at the top.
3. If by-pass valve is combined with flanged sluice valves, the by-pass valve should be open first to balance the entrance and exit’s pressure.
4. If those API 6D gate valves are used frequently, please lubricate them at least once per month.

1. Before installing flanged gate valves, please check valve body, sealing surface and other parts to avoid any dirt attachment.
2. Bolts at any connection joint should be fastened.
3. Inspect the packing part to ensure excellent sealing performance and ensure sluice valves to open flexibly.
4. When installing, some space should be left for flanged sluice valves to actuate.
5. The connection of actuating devices should be strictly conformed to circuit diagram.
6. API 6D gate valves should be maintained regularly.
7. Avoid collision or extrusion.

Payment, Package and Transportation
We accept such payments as T/T, D/P, D/A, or L/C. Our flanged gate valves will be packed in standard wooden boxes and delivered by railway, sea, or airplane.

Pressure Testing of API Flanged Gate Valves

Design and Manufacture Face to Face / End to End Flange Dimension Butt Welding Dimension Pressure Temperature Test Inspection and Test
API 600 ANSI B16.10 ANSI B16.5 ANSI B16.25 ANSI B16.34 API 598
API 6D API 6D ANSI B16.5 ANSI B16.25 ANSI B16.34 API 6D

Specification of API 6D Gate Valves

PN(Lb) Nominal Pressure   Shell Test Water Seal Test   Air Seal Test
MPa Lbf/in MPa Lbf/in MPa Lbf/in
150 3.0 430 2.2 315 0.4-0.7 60-100
300 7.7 1110 5.7 815
600 15.3 2220 11.3 630
900 23.0 3330 17 2445