Self-Sealing Power Station Gate Valve

Material:Carbon Steel (WCB, WCC for strength), Stainless Steel (SS304, SS316 for corrosion resistance), Cast Iron

Size Range:DN50-DN800

Connection Options:Flanged, Threaded (NPT, BSP), Butt Weld, Socket Weld

Working Pressure:Class 150 to Class 2500

Working Temperature:-29°C to 425°C

Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE

Manufacturing Method:Cast, Forged, Machined

Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids

Manufacturing Standard:API 600, API 602, ASME B16.34

Product Overview

The Self-Sealing Power Station Gate Valve is designed specifically for high-pressure, high-temperature applications commonly found in power stations and industrial facilities. Its self-sealing design leverages the internal pressure to enhance the seal, ensuring reliable shut-off performance even in extreme conditions. This valve is made from high-strength materials and is built to meet rigorous industry standards, providing dependable operation in critical applications.

Product Features

elf-Sealing Mechanism: Utilizes internal pressure to enhance the seal, improving leak-tightness as pressure increases.

High Durability: Constructed from materials like chrome molybdenum steel, ensuring resistance to high pressure and temperature.

Reliable Shut-Off: Gate design provides full, unimpeded flow when open, with tight sealing when closed, suitable for demanding applications.

Minimal Pressure Drop: Full bore design allows for efficient flow without significant pressure loss.

Extended Service Life: Designed for longevity in harsh conditions with corrosion and wear-resistant materials.

Specification Parameters

Structural Length Standard:
According to ASME B16.10, DIN 3202, BS EN 558

Connection Forms Standards:
Flanged per ASME B16.5, Threaded (NPT, BSP) per ANSI/ASME B1.20.1, Butt Weld per ASME B16.25, Socket Weld per ASME B16.11

Available Sizes (Caliber):
2″, 3″, 4″, 6″, 8″, 10″, 12″, 14″, 16″, 18″, 20″, 24″

Pressure-Temperature Rating:
Class 150, 300, 600, 900, 1500 as per API 600 and ASME B16.34

Pressure Range:
Up to 2,500 psi depending on size and material

Temperature Range:
-29°C to 425°C depending on material and sealing options

Nominal pressure（Lb)	Strength test		Water seal test		Gas seal test
Nominal pressure（Lb)	MPa	Lbf/in2	MPa	Lbf/in2	MPa	Lbf/in2
150	3.1	450	2.2	315	0.6	60
300	7.8	1125	5.6	815	0.6	60
600	15.3	2225	11.2	1630	0.6	60

The main part material

Body, bonnet, gate	WCB	1Cr18Ni9Ti	CF8(304)	CF3(304L)	1Cr18Ni12Mo2Ti	CF8M(316)
Sealing surface	Cr13 or cemented carbide	Body (W) or cemented carbide (Y)
Stem and inner parts	2Cr13	1Cr18Ni9Ti	0Cr19Ni9(304)	00Cr19Ni11(304L)	1Cr18Ni12Mo2Ti	0Cr17Ni12Mo2(316)
filler	Flexible graphite
Gasket	Stainless steel spiral wound gasket
Suitable media	Water, steam, oil and so on	Nitric acid and other corrosive media		Strong oxidizing media	Acetic acid and other corrosive media
proper temperature	-29~425℃	-40~500℃

The main shape and connection dimensions

Nominal diameter	The main dimensions and connection dimensions
Nominal diameter	L	D	D1	D2	b	Z-d	H	D0
150LB
50	178	150	120.5	92	16	4-Φ19	323	200
65	190	180	139.5	105	18	4-Φ19	347	250
80	203	190	152.5	127	19	4-Φ19	383	250
100	229	230	190.5	157	24	8-Φ19	457	300
125	254	255	216	185.7	24	8-Φ22	632	300
150	267	280	241.5	216	26	8-Φ22	635	350
200	292	345	298.5	270	29	8-Φ22	762	350
250	330	405	362	324	31	12-Φ25	895	400
300	356	485	432	381	32	12-Φ25	1080	500
350	381	535	476	413	35	12-Φ29	1295	600
400	406	595	540	470	37	16-Φ29	1435	600
300LB
50	216	165	127	92	22	8-19	330	250
65	241	190	149	105	25	8-22	368	250
80	283	210	168.5	127	29	8-22	394	300
100	305	255	200	157	32	8-22	473	300
125	381	280	235	186	35	8-22	660	350
150	403	320	270	216	37	12-22	711	350
200	419	380	330	270	41	12-25	813	400
250	457	445	387.5	324	48	16-29	1003	500
300	502	520	451	381	51	16-32	1137	600
350	762	585	514.5	413	54	20-32	1489	600
400	838	650	571.5	470	57	20-32	1581	650

Specification Applications

Industries

Power Plants: Used for controlling high-pressure steam and water flow in power generation facilities.
Petrochemical and Chemical Plants: Suitable for systems requiring reliable flow control under high pressure and temperature.
Industrial Boilers: Controls the flow of high-temperature steam in boiler systems, ensuring safe and efficient operation.
Oil & Gas Industry: Utilized in high-pressure pipelines and critical systems within refineries and gas processing facilities.

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

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