Tilting Disc Check Valve

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Tilting Disc Check Valve

SEDELON Tilting Disc Check Valves are engineered for low-slam, non-return protection in pipelines where backflow must be stopped without water-hammer shock. The disc tilts open on forward flow and pivots back onto the seat the instant flow reverses, giving a faster, quieter close than a swing-check design — ideal for pump discharge, compressor lines, and long-distance transmission.

Built to ASME B16.34 (design & manufacture) and tested to API 598 (shell + seat), the valves cover NPS 2″–24″ and Class 150–900, with flanged (ANSI B16.5) or butt-welded (ANSI B16.25) ends. A broad material menu — WCB, WC6/WC9, CF8/CF8M, LCB/LCC, Monel, CN7M — supports water, steam, oil & gas, and low-temperature duty.

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product feature

Low-slam closing — the tilting disc stops reverse flow with minimal water hammer and pipeline shock.
Faster than swing checks — short disc travel and a spring-independent pivot give a quicker, quieter seat on flow reversal.
Full-bore flow path — low pressure drop across the full NPS 2″–24″ range.
Confirmed standards — designed to ASME B16.34, shell & seat tested to API 598.
Flexible ends — flanged (ANSI B16.5) and butt-welded (ANSI B16.25) configurations.
Wide pressure coverage — Class 150 through Class 900 for utility to critical service.
Broad material menu — WCB, WC6/WC9, CF8/CF8M, LCB/LCC, Monel, CN7M for corrosion and low-temperature duty.
Multi-orientation installation — horizontal or vertical-up flow; optional counterweight for large-bore lines.

Face to Face Dimensions:ANSI B16.10

Flange end Dimension :ANSI B16.5

Butt Welded Dimensions：ANSI B16.25

Design and Manufacture：ANSI 16.34

Pressure Test：API598

Materials：WCB 、WC6 、WC9 、CF8、 CF8M、 CF3、 CF3M 、CN7M、LC1

LC2、LC3、LCB、LCC、Monel、 20# Alloys、4A、5A

How a Tilting Disc Check Valve Works

On forward flow the disc tilts up off the seat and rides nearly parallel to the pipe, so the flow path stays full-bore with very low resistance. The moment flow slows or reverses, the disc pivots back on its trunnion and seats quickly — there is no long swing arm to slam, which is why tilting-disc designs generate far less water hammer than conventional swing checks. Because the motion is a short pivot rather than a long arc, the close is also more repeatable under pulsing or compressor duty.

Material & Service Selection

Body / Trim Material	Typical Service
WCB / WC6 / WC9	Carbon-steel utility, high-temperature steam (WC6/WC9)
CF8 / CF8M / CF3 / CF3M	Stainless service, mild corrosion, food & pharma washdown
LCB / LCC	Low-temperature / cryogenic duty down to −46 °C (LCC lower)
Monel / CN7M	Seawater, sour and highly corrosive media
20# Alloys / 4A / 5A	Special alloy and duplex/super-duplex requirements

Typical Applications

Pump discharge & compressor lines — protects equipment from backflow and surge.
Oil & gas transmission — long-distance lines where water-hammer control matters.
Power & boiler feed — high-temperature carbon/alloy trim service.
Cryogenic & LNG — LCB/LCC builds for low-temperature duty.
Water & desalination — Monel or stainless trim for corrosive duty.

FAQ

Q1: What is a tilting disc check valve, and how is it different from a swing check valve?
A: Both are non-return valves, but the tilting disc pivots on a trunnion through a short arc instead of swinging on a long hinge. That short travel means a faster, lower-slam close — better for lines prone to water hammer. If you specifically need a swing design, see our Swing Check Valve.

Q2: Which standards does SEDELON build to?
A: Design and manufacture follow ASME B16.34; every valve is shell- and seat-tested to API 598. Face-to-face is ANSI B16.10, flanges ANSI B16.5, butt-weld ends ANSI B16.25.

Q3: What sizes and pressure classes are available?
A: NPS 2″–24″ across Class 150–900, with the full flange and face-to-face dimension table listed above.

Q4: Which end connections are offered?
A: Flanged (ANSI B16.5) and butt-welded (ANSI B16.25). Choose butt-weld for permanent, leak-tight piping and flanged for lines that need frequent disassembly.

Q5: Which material should I specify for low-temperature or cryogenic service?
A: Use LCB or LCC body/trim for low-temperature duty (down to roughly −46 °C for LCC). Confirm your exact minimum design temperature with our team when ordering.

Q6: Can it be installed vertically?
A: Yes — horizontal or vertical-up flow. For very large bores, an optional counterweight stabilizes the disc and buffers closing.

Class150 Tilting Disc Check Valve

NPS	in	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
D3	mm	51	64	76	102	127	152	203	254	305	337	387	438	489	591
L(RF)	mm	203	216	241	292	330	356	495	622	699	787	864	978	978	1295
D2	mm	92	105	127	157	186	216	270	324	381	413	470	533	584	692
D1	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 Tilting Disc Check Valve

NPS	in	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
D3	mm	51	64	76	102	127	152	203	254	305	337	387	432	483	584
L(RF)	mm	267	292	318	356	400	445	533	622	711	838	864	978	1016	1346
D2	mm	92	105	127	157	186	216	270	324	381	413	470	533	584	692
D1	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 Tilting Disc Check Valve

NPS	in	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
D3	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
D2	mm	92	105	127	157	186	216	270	324	381	413	470	533	584	692
D1	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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