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API Cast Steel Gate Valve

Product Description

Type: Direct-acting Connection Form: Flange Actuator: Manual Thread Position of Valve Rod: Outside Gate Valve Standard: ANSI Size: 2"~56" Specification: CE, SGS HS Code: 8481804090 Material: Carbon Steel Pressure: Ordinary Pressure Seal Surface: Wedge Gate Valve Usage: Drain Application: Industrial Usage, Water Industrial Usage, Household Usage Trademark: FYV Origin: China Designs
Design: API-600 (carbon steel), API 603 (stainless/alloy steel), API 6D
Pressure/temperature rating: ASME B 16.34
Flange dimensions: ASME B16.5 (up to 24" nominal diameter) or MSS SP 44 (above 24'')
Butt / socket welding ends: ASME B16.25 (on demand)
Face to face dimensions: ASME B 16.10
NACE Service: MR-01-75 or MR-01-03
Testing: API 598
Wedge design: Solid (up to 4") and flexible (5" and above)
Bolted bonnet
Outside / inside screw and yoke - non rotating stem / roating stem
Graphite packing
Stainless steel or graphite gaskets
Ends RF, RTJ or BW
Manual valves: Hand-wheel, impact hand-wheel, chain-wheel, gear operation
Actuation: Electric, pneumatic or hydraulic
Low fugitive emissions control
On demand: DIN gate valves
On demand: Cryogenic service
Materials
Carbon steel WCA, WCB, WCC, etc.
Low carbon steel LCB, LCC, etc.
Low alloy steel WC1, WC5, WC6, WC9, etc.
Low carbon low Alloy Steel LC2, LC3, etc.
Medium alloy steel C5, C12, C12A, etc.
Stainless steel CF8, CF8M, CF8C, CF10, CG8M, etc.
Low carbon stainless steel CF3, CF3M, CG3M, etc.
Super stainless steel CN7M (Alloy 20), CN3M (Alloy 20 modified), CT15C, etc
Duplex stainless steel CE8MN, CD6MN, CD3MN, etc.
Super Duplex Stainless Steel CE3MN, CD3MNWCuN, etc.
High Nickel Alloys: Monel M30C, Monel M35-1, Monel CZ100, Inconel CY40 (Inconel 600), CW2M (Hastelloy C4), N12MV (Hastelloy B), CW12MW (Former Hastelloy C-276), CW6M (New Hastelloy C-276), CU5MCuC (Incoloy 825), N7M (Hastelloy B2), CW6MC (Incoloy 625), etc.
Aluminum Bronze 95500, 95600, 95800, etc.
Trims: 1-2-5-8-10 as per API600
Dimensional Range
API 600 carbon steel: NPS 2'' - 64", Class ANSI 150-600#
API 603 stainless / alloy steel: NPS 1/2'' - 24", Class 150-300#

Design Feature:

Body and Bonnet Connection
The body and bonnet of Class 150~Class 900 gate valves are usually bolted bonnet design. And Class 1500~Class 2500 gate valves are usually of pressurized seal design.


Packing Seal
Molded flexible graphite is used for packing material. PTFE or combined packing material can be also used if being requested by the customers. The internal surface of the stuffing box, of which area is contacted with the packing, is of excellent finish(Ra 3.2um). The stem surface, contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness(Ra 0.8um)and ensure the reliable tightness of the stem area.

Back Seating Design
All our gate valves have the back seating design. In most cases, the carbon steel gate valve is fitted with a renewable back seat. For Stainless Steel Gate Valve, the back seat is machined directly in the bonnet or is machined after welding. When the gate valve is at fully open position, the sealing of the back seat can be very reliable. However, as per the requirement of API600, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing.

Seat
For carbon steel gate valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Welded seat is used for NPS

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