Slab Gate Valve

Our valves utilize cutting-edge technology, undergo rigorous quality control, ensuring outstanding performance and durability.

Slab Gate Valve

Main Material：

WC6 、WC9 、CF8、 CF8M、 CF3、 CF3M 、CN7M、LC1、LC2、LC3、LCB、LCC、Monel、 20# Alloys、4A、5A, ect.

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product feature

Face to Face Dimensions:ANSI B16.10

Flange end Dimension :ANSI B16.5

Butt Welded Dimensions：ANSI B16.25

Design and Manufacture：API 6D

Pressure Test：API 598

Technical Features of Sedelon Slab Gate Valves

Full Bore Design: Ensures minimal pressure drop and allows the passage of PIGs (Pipeline Inspection Gauges).

Bi-directional Sealing: Reliable shut-off regardless of flow direction.

Emergency Sealant Injection: Built-in fittings for emergency stem and seat sealing to prevent leaks under extreme conditions.

Self-Relieving Seats: Automatically relieves excess pressure in the body cavity to protect the valve integrity

Specifications, Sizes, and Material Grades

Parameter	Specifications
Design Standard	API 6D, ASME B16.34
Size Range	2” to 48” (DN50 – DN1200)
Pressure Class	Class 150 to Class 2500
Body Material	WCB, LCC, CF8, CF8M, A105, F316
Connection	Flanged (RF, RTJ), Butt-Weld (BW)
Operation	Manual, Gear, Electric, or Pneumatic Actuator

Industrial Applications & Operating Environments

Mainline Transmission: Long-distance crude oil and natural gas pipelines.

Storage & Terminals: Tank farms and loading stations.

Petrochemical Refining: Handling viscous or high-pressure media.

Wellhead Systems: Upstream extraction and production manifolds.

Product FAQ

Q1: What are the main benefits of a Slab Gate Valve vs. a Wedge Gate Valve?

A: Slab gate valves feature a flat, through-conduit disc. This provides a smooth flow path with no turbulence, allows for pipeline pigging, and reduces seat wear during operation.

Q2: Can Sedelon customize valves for sour service (H2S)?

A: Yes. We offer specialized material configurations compliant with NACE MR0175/ISO 15156 to prevent sulfide stress cracking in harsh environments.

Q3: Is it possible to perform maintenance while the valve is under pressure?

A: Our slab gate valves are equipped with emergency sealant injection ports. This allows operators to inject grease to restore sealing integrity temporarily without shutting down the line.

Q4: What testing is performed before shipping?

A: Every valve undergoes hydrostatic and air testing according to API 6D and API 598 standards. We also provide Material Test Reports (MTR) and inspection certificates upon request.

Q5: How do I choose between a slab gate valve and an expanding gate valve?

A: Slab gate valves are ideal for high-speed flow and pigging operations. Expanding gate valves provide a mechanical seal in both open/closed positions and are often preferred for wellhead services. Consult our engineers for a recommendation.

Class150 Slab Gate Valve

NPS	in	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
d	mm	51	64	76	102	127	152	203	254	305	337	387	438	489	591
L(RF)	mm	178	190	203	229	254	267	292	330	356	381	406	432	457	508
L(BW)	mm	216	241	283	305	381	403	419	457	502	572	610	660	711	813
L(RTJ)	mm	191	203	216	241	267	279	305	343	368	394	419	445	470	521
d1	mm	92	105	127	157	186	216	270	324	381	413	470	533	584	692
d2	mm	120.5	139.5	152.5	190.5	216	241.5	298.5	362	432	476	540	578	635	749.5
D	mm	152	178	190	229	254	279	343	406	483	533	597	635	699	813
b	mm	16	18	19	24	24	26	29	31	32	35	37	40	43	48
n-Фd	mm	4-19	4-19	4-19	8-19	8-22	8-22	8-22	12-25	12-25	12-29	16-29	16-32	20-32	20-35

Class300 Slab Gate Valve

NPS	in	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
d	mm	51	64	76	102	127	152	203	254	305	337	387	432	483	584
L(RF)	mm	216	241	283	305	381	403	419	457	502	762	838	914	991	1143
L(BW)	mm	216	241	283	305	381	403	419	457	502	762	838	914	991	1143
L(RTJ)	mm	232	257	298	321	397	419	435	473	518	778	854	930	1010	1165
d1	mm	92	105	127	157	186	216	270	324	381	413	470	533	584	692
d2	mm	127	149	168.5	200	235	270	330	387.5	451	514.5	571.5	628.5	686	813
D	mm	165	190	210	254	279	318	381	445	521	584	648	711	775	914
b	mm	23	26	29	32	35	37	42	48	51	54	58	61	64	70
n-Фd	mm	8-19	8-22	8-22	8-22	8-22	12-22	12-25	16-29	16-32	20-32	20-35	24-35	24-35	24-41

Class600 Slab Gate Valve

NPS	in	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
d	mm	51	64	76	102	127	152	200	248	298	327	375	419	464	559
L(RF)	mm	292	330	356	432	508	559	660	787	838	889	991	1092	1194	1397
L(BW)	mm	292	330	356	432	508	559	660	787	838	889	991	1092	1194	1397
L(RTJ)	mm	295	333	359	435	511	562	664	791	841	892	994	1095	1200	1407
d1	mm	92	105	127	157	186	216	270	324	381	413	470	533	584	692
d2	mm	127	149	168.5	216	267	292	349	432	489	527	603	654	724	838
D	mm	165	190	210	273	330	356	419	508	559	603	686	743	813	940
b	mm	26	29	32	38	45	48	56	64	67	70	77	83	89	102
n-Фd	mm	8-19	8-22	8-22	8-25	8-29	12-29	12-32	16-35	20-35	20-38	20-41	20-44	24-44	24-52

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