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Gate Valves

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Service Image

Gate Valves

Gate valves are primarily designed for on/off service, providing a straight-through flow path with minimal resistance when fully open. Unlike globe valves, which are ideal for throttling, gate valves are best suited for applications where a full flow or complete isolation is required.

The key feature of a gate valve is its wedge-shaped disc (gate), which moves linearly along the flow path to either block or allow fluid. This design ensures low pressure drop and high flow efficiency when the valve is fully open. Gate valves are widely used in pipelines carrying liquid, gas, or slurry, where long-term durability and reliable isolation are critical.

At Exceed, our gate valves are engineered with robust materials, precision-machined components, and high-integrity seating surfaces, ensuring smooth operation, tight shut-off, and long service life even under demanding operating conditions. Our valves feature flexible wedge designs, which provide improved sealing performance and better adaptability to temperature changes.

 

Standards:

Manufacturing Std.: API 600 / ASME B16.34

Testing & Inspection Std.: API 598

Face to Face: ASME B16.10

Flange Dimensions: ASME B16.5

 

Engineering Options:

  • Electric Actuation: Multi-turn electric actuator for remote or automated operation.
  • Bypass Arrangement: Bypass connection for pressure equilization for easier valve operation.
  • Extended Spindle: Extended stem/spindle arrangement for applications requiring remote operation or insulation clearance.
  • Stllite Hardfacing: Stellite overlay on seating surfaces for improved resistance to erosion, wear & high-temprature service.

Gate valves operate using a wedge-shaped disc (gate) that moves perpendicular to the flow. Turning the handwheel or actuator raises or lowers the gate:

  • Fully Open – The gate is completely lifted out of the flow path, allowing unrestricted flow with minimal pressure drop.

  • Fully Closed – The gate is lowered onto the seat, completely isolating the flow.

  • Intermediate Positions – Gate valves are not recommended for throttling, as partial opening can cause vibration, wear, and erosion of the gate and seat.

Design features that make gate valves effective for isolation:

  • Straight-through flow reduces pressure drop and turbulence

  • Guided gate movement ensures smooth operation and accurate sealing

  • Multiple gate designs (solid wedge, flexible wedge, parallel) can be chosen based on application requirements

Gate valves are selected for applications where full flow or complete shut-off is required:

  • Water and wastewater pipelines – Provide reliable isolation for maintenance and system control

  • Oil and gas transmission – Offer minimal flow resistance and can handle high pressure

  • Steam pipelines – Used in combination with safety devices to isolate sections of the system

  • Chemical and process lines – Provide dependable shut-off in critical piping networks

  • Fire protection systems – Ensure full flow and isolation when required

  • Low Flow Resistance
    Gate valves offer straight-through flow when fully open, minimizing pressure drop.
    Exceed ensures precision machining for smooth flow and minimal turbulence.

  • Reliable Shut-Off
    The wedge gate provides complete isolation of the line when closed.
    Exceed designs gates and seats for tight sealing, reducing the risk of leaks.

  • Durable Construction
    Gate valves are built to withstand high pressure and temperature cycles.
    Exceed uses high-grade materials and robust body designs for long-lasting performance.

  • Smooth Operation
    Well-guided gate movement reduces operational effort and wear.
    Exceed optimizes stem and gate alignment to ensure smooth operation and longer valve life.

  • Enhanced Sealing with Flexible Wedge
    Flexible wedge designs improve the valve’s ability to adapt to thermal expansion and maintain reliable sealing, providing superior performance in varying operating conditions.
    Exceed incorporates flexible wedge design in all its gate valves to enhance sealing reliability and long-term durability.

No Parts Name Qty. Materials
1 Body 1 ASTM A216 Gr. WCB

ASTM A351 Gr. CF8

ASTM A351 Gr. CF8M
2 Bonnet 1 ASTM A216 Gr. WCB

ASTM A351 Gr. CF8

ASTM A351 Gr. CF8M
3 Wedge 1 ASTM A743 CA15 / ASTM A216 Gr. WCB with SS410 (13% Cr) Overlay

ASTM A351 Gr. CF8

ASTM A351 Gr. CF8M
4 Seat Ring 2 ASTM A268 TP 410

Integrated with Body

Integrated with Body
5 Stem 1 ASTM A276 Type 410

ASTM A276 Type 304

ASTM A276 Type 316
6 Gland Follower 1 ASTM A216 Gr. WCB

ASTM A351 Gr. CF8

ASTM A351 Gr. CF8M
7 Yoke 1 ASTM A526
8 Back Seat 1 ASTM A276 Type 410

ASTM A276 Type 304

ASTM A276 Type 316
9 Gasket 1 Spiral Wound Gasket with SS304 Winding and Carbon Fillier

Spiral Wound Gasket with SS304 Winding and Carbon Fillier

Spiral Wound Gasket with SS316 Winding and Carbon Fillier
10 Gland Packing Req. Graphite Rings
11 Stud - Nuts Req. MS - MS / ASTM A193 Gr. B7 - ASTM A194 Gr. 2H

ASTM A193 Gr. B8 - ASTM A194 Gr. 8

ASTM A193 Gr. B8M - ASTM A194 Gr. 8M
12 Hand Wheel 1 ASTM A536

 

Service Rating Test Pressure
Material Class Working Pressure @ 38°C Max Temp. Shell Test High Pressure Closure Test (Water) Low Pressure Closure Test (Air)
WCB

150

300

19.6 bar

51.1 bar

425°C

29.4 bar

76.7 bar

21.6 bar

56.2 bar

 7 bar
CF8/CF8M

150

300

19 bar

49.6 bar

 425°C

28.5 bar

74.4 bar

20.9 bar

54.6 bar

 7 bar

Important Notes:

1) Temprature shown is the maximum service temprature of the valve. The allowable working pressure decreases as temprature increases. Always refer to the ASME B16.34 pressure-temprature ratings for the exact value at the required temprature.

4) Hydrostatic test pressures are based on API 598 requirements:

  • Body (shell) test = 1.5 x rated working pressure
  • Seat (closure) test = 1.1 x rated working pressure
Size DN F to F ØD ØRF PCD ØM N T
15 108.00 89.00 35.00 60.40 16.00 4 11.00
20 118.00 98.50 43.00 70.00 16.00 4 11.00
25 127.00 108.00 51.00 79.20 16.00 4 11.00
40 165.10 127.00 73.00 98.5 16.00 4 14.2
50 177.80 152.00 92.00 120.60 19.00 4 15.70
65 190.50 178.00 105.00 139.70 19.00 4 17.50
80 203.20 190.50 127.00 152.40 19.00 4 19.00
100 228.60 229.00 157.00 190.50 19.00 8 24.00
125 254.00 254.00 186.00 215.9 22.00 8 24.00
150 266.70 279.00 216.00 241.30 22.00 8 25.00
200 292.10 343.00 270.00 298.40 22.00 8 28.50
250 330.20 406.00 324.00 362.00 25.00 12 30.00
300 355.60 483.00 381.00 431.8 25.00 12 32.00
350 381.00 534.00 413.00 476.20 28.00 12 35.00
400 406.40 597.00 470.00 539.70 28.00 16 36.50
450 432.00 635.00 533.00 577.80 32.00 16 36.50
500 457.00 698.50 584.00 635.00 32.00 20 42.90
600 508.00 812.80 692.00 749.30 35.00 20 47.70

(Dimensions above 600mm available on request)

All dimensions are in mm

Size DN F to F ØD ØRF PCD ØM N T
15 152.00 95.00 35.00 66.50 16.00 4 14.30
20 178.00 117.00 43.00 82.50 19.00 4 15.70
25 203.00 124.00 51.00 89.00 19.00 4 17.50
40 229.00 155.40 73.00 114.30 22.00 4 20.50
50 267.00 165.00 92.00 127.00 22.00 8 22.00
65 292.00 190.50 105.00 149.30 22.00 8 25.00
80 317.5 209.5 127.00 168.10 22.00 8 28.5
100 356.00 254.00 157.00 200.10 22.00 8 32.00
125 400.00 279.40 186.00 234.90 22.00 8 35.00
150 444.50 317.50 216.00 269.70 22.00 12 36.5
200 559.00 381.00 270.00 33.20 25.00 12 41.00
250 622.00 444.50 324.00 387.30 29.00 16 48.00
300 711.00 520.70 381.00 450.80 32.00 16 51.00
350 762.00 584.20 413.00 514.30 32.00 20 54.00
400 838.20 647.70 470.00 571.50 35.00 20 57.00
450 914.00 711.20 533.40 628.60 35.00 24 60.40
500 991.00 774.40 584.20 685.80 35.00 24 63.50
600 1143.00 914.40 692.10 812.80 41.00 24 69.80

(Dimensions above 600mm available on request)

All dimensions are in mm

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