Custom DN700 WCB Cast Steel Flange Gate Valve Supplier, Factory

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Custom DN700 WCB Cast Steel Flange Gate Valve Supplier, Factory

Type: Metal to metal seated

Series: Z41H-64C

Size: DN50-DN1000/2â€-40â€

Pressure rating: PN16/PN25/PN64/150LB/300LB/600LB

Design standard: BS/API/DIN/GOST

Service: OEM&ODM

The large size gate valves have high torque and can be flexibly matched with multi turn electric actuators, hydraulic actuators, or worm gear box manual mechanisms.

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Product Description

Product Specifications

Valve Type	Metal seat gate valve	Structure	Rising type
Standard	EN/API/DIN/GOST	Workmanship	Investment casting
Sealing Direction	Bidirectional	Sealing Grade	Zero leakage
Temperature	-30°C < T < 425°C	Operation	Handwheel

Characteristics

The valve body adopts integral casting or forging technology, and the wall thickness is strengthened according to the pressure level, which can withstand pipeline water hammer impact and industrial site vibration. The valve stem and gate are rigidly connected (T-shaped groove + bolt/pin shaft) to prevent damage to the sealing surface caused by gate shaking.

Advantages

Convenient Maintenance: The valve body and valve cover are connected by flanges, allowing internal components like gate plates and seals to be replaced by removing only the cover. The packing box supports online replacement, minimizing pipeline downtime.
High Temperature Resistance:
• Carbon Steel (WCB): Metal sealed, range -29℃ to 540℃, for water, oil, and steam.
• Alloy Steel (WC6/WC9): Resistance up to 650℃, ideal for power plant steam pipelines.
Versatile Sealing Options: Soft sealing structures (PTFE/EPDM) are available for low temperature/pressure scenarios (-20℃ to 180℃), such as municipal water supply.

Packing & Application

Packing: Standard export wooden case packaging ensures the safety of the valves during international transit.

Application Scenarios: These large size gate valves are widely used in large-diameter pipeline systems across oil and gas, electricity, municipal water supply, chemical engineering, metallurgy, and infrastructure industries.

Material Specifications

Valve body/cover	Gate board/seat	Stem	Stem nut	Padding	Handwheel
Carbon steel	Quality carbon steel + carbide alloy or stainless steel	Chrome stainless steel	Aluminum bronze	Graphite asbestos packing	Malleable iron ductile Iron
Ti-Cr-Ni steel	Stainless steel or carbide alloy	Ti-Cr-Ni stainless steel	Aluminum bronze	Baptist PTFE	Malleable iron ductile Iron
Ti-Cr-Ni-Mo steel	Stainless steel or carbide alloy	Ti-Cr-Ni stainless steel	Aluminum bronze	Asbestos packing	Malleable iron ductile Iron
Cr-Mo steel	Alloy Steel + carbide alloy	Al-Cr-Mo steel 318 (anti-S series)	Aluminum bronze	Flexible Graphite Filled PTFE	Malleable iron ductile Iron

Dimensions & Technical Data

PN (MPa)	DN (mm)	L	D	D1	D2	b	f	N-Φd	H	H1	D0
1.6	50	250	160	125	100	16	3	4-Φ18	358	438	240
	100	300	215	180	155	20	3	8-Φ18	502	620	320
	200	400	335	295	265	26	3	12-Φ23	820	1039	400
	400	600	580	525	485	36	4	16-Φ30	1452	1887	640
	600	800	840	770	718	48	5	20-Φ41	1874	2346	800
Selected 2.5 MPa Series
2.5	150	350	300	250	218	30	3	8-Φ25	676	847	360
	300	600	485	430	390	40	4	16-Φ30	1142	1472	560
	500	700	730	660	610	52	4	20-Φ41	1676	2181	720

* Full range of sizes (DN15-DN600) and pressures (PN1.6-PN4.0) available as per technical data sheets.

Frequently Asked Questions

What is the temperature range for these metal seat gate valves?

Depending on the material, the temperature range varies. Carbon steel (WCB) valves handle -29℃ to 540℃, while alloy steel (WC6/WC9) can withstand up to 650℃. Soft sealing options are available for -20℃ to 180℃.

Can the stem packing be replaced while the valve is in service?

Yes, the design of the packing box supports online replacement of the packing, which means maintenance can be performed without interrupting the normal operation of the pipeline.

In which industries are these gate valves most commonly used?

They are widely applied in heavy-duty industrial sectors including oil and gas, power generation, chemical engineering, metallurgy, and municipal water supply and drainage systems.

What ensures the durability of the valve stem and gate connection?

The stem and gate are rigidly connected using a T-shaped groove combined with a bolt or pin shaft. This rigid connection prevents gate shaking and protects the sealing surfaces from premature wear.

How is the valve protected during international shipping?

All valves are packed according to standard export requirements in sturdy wooden cases to prevent damage during long-distance transportation and handling.

Does the valve body support high-pressure impact?

Yes, the valve body is manufactured using integral casting or forging, with wall thicknesses reinforced to withstand pipeline water hammer impacts and site vibrations.