Pressure Seal Swing Check Valve

Introduction

A Pressure Seal Swing Check Valve is a high-performance valve designed to prevent reverse flow in high-pressure systems. Its distinguishing feature is the pressure seal bonnet, which offers superior sealing performance under high-pressure conditions. As the system pressure increases, the pressure seal mechanism enhances the seal integrity, making it highly reliable in demanding applications.

The valve operates using a swing mechanism, where a disc swings away from the valve seat to allow forward flow and closes to prevent backflow. It is typically made from robust materials like carbon steel, stainless steel, or alloy steel to withstand high pressures and temperatures. This valve is often used in critical industrial systems requiring durability, reliability, and minimal maintenance.

Applications

Pressure Seal Swing Check Valve is trusted across various industries for its precision, durability, and reliability. Explore its wide-ranging applications below:

Oil & Gas

Installed in upstream, midstream, and downstream operations, including pipelines, refineries, and processing plants.

Water Treatment

Used in high-pressure pump systems and pipelines to prevent backflow of water or treated fluids. Ensures system integrity and protects sensitive equipment.

Power Generation

Used in high-pressure steam lines, feedwater systems, and condensate return lines in thermal and nuclear power plants. Prevents backflow to protect turbines, boilers, and pumps.

Chemical & Petrochemical Plants

Handles aggressive and high-pressure chemical flows in production and processing lines. Ensures safety and operational efficiency by preventing backflow in critical systems.

Industrial Manufacturing

Used in high-pressure steam systems, gas pipelines, and hydraulic systems. Ensures flow direction and protects equipment from damage caused by backflow.

Mining & Offshore

Protects ballast systems, cooling systems, and high-pressure pipelines in marine and offshore environments. Withstands harsh conditions while ensuring reliable operation.

Pulp and Paper Industry

Installed in high-pressure steam lines and process fluid pipelines to prevent backflow and maintain process efficiency. Ensures the longevity of pumps and other critical equipment.

Dimensional Detail

Applicable Standards

STEEL CHECK VALVES, API 594/API 6D
STEEL C HECK VALVES, ISO 14313
STEEL VALVESM ASME B16.34
FACE TO FACE, ASME B16.10
END FLANGES, ASME B16.5
INSPECTION AND TEST, API 598/API 6D

Design Description

PSB, PRESSURE SEAL BONNET
FLEXIBLE DISC, FULLY GUIDED
RENEWABLE SEAT RINGS
FLANGED OR BUTT WELDING ENDS

Materials of Parts

No	Part Name	ASTM Material
No	Part Name	Carbon Steel		Alloy Steel	Stainless Steel
1	Body	A216-WCB	A352-LCB	A217-WC6	A351-CF8	A351-CF8M
2	Pres. Seal Bonnet	A216-WCB	A352-LCB	A217-WC6	A351-CF8	A351-CF8M
3	Disc	WCB+HF	A352-LCB	WC6+HF	CF8+HF	CF8M+HF
4	Hinge	A216-WCB	A352-LCB	A217-WC6	A351-CF8	A351-CF8M
5	Seat Ring	A105+HF	A350-LF2	A182-F11+HF	A240-304+FL	A240-316+HF
6	Hinge Ring	A276-420	A276-420	A276-304	A276-304	A276-316
7	Bonnet Gasket	Spiral wound (Graphite+304)		Spiral wound (Graphite+316)
8	Adapter	Carbon Steel		A276-304	A276-304	A276-316
9	Retainer Ring	Carbon Steel		A276-F11	A276-304	A276-316
10	Cover	A216-WCB	A352-LCB	A217-WC6	A351-CF8	A351-CF8M
11	Stud	A193-B7	A320-L7	A193-B16	A193-B8	A193-B8
12	Nut	A194-2H	A194-4	A194-7	A194-8	A94-8
13	Eye Bolt	Carbon Steel

NOTE :

Graphic Optional.
Disc and seat ring may either be solid facing material or a base material equal to or better than the body/bonnet material with facing as shown.

Dimensions Data ANSI Class 900Lb

NPS	2	2 ^1/2	3	4	6	8	10	12	14	16
DN	50	65	80	100	150	200	250	300	350	400	mm
L1 (BW)	8.50	10.00	12.00	14.00	20.00	26.00	31.00	36.00	39.00	43.00	in
L1 (BW)	216	254	305	356	508	660	787	914	991	1092	mm
L (RF)	14.50	16.60	15.00	18.00	24.00	29.00	33.00	38.00	40.50	44.50	in
L (RF)	368	419	381	457	610	737	838	965	1029	1130	mm
L2 (RTJ)	14.62	16.62	15.12	18.12	24.12	29.12	33.12	38.12	40.88	44.88	in
L2 (RTJ)	371	422	384	460	613	740	841	968	1038	1140	mm
H	9.50	9.50	10.00	13.38	15.75	18.12	21.62	24.00	27.00	29.50	in
H	240	240	255	340	400	460	550	610	685	750	mm
WT(kg)	22	34	38	71	176	485	761	1125	1345	1490	BW
WT(kg)	44	55	61	116	255	630	940	1433	1710	1820	RF/RTJ

Dimensions Data ANSI Class 1500Lb, ANSI Class 2500Lb

NPS	2	2 1/2	3	4	6	8	10	12	14	2	2 1/2	3	4	6	8	10	12
DN	50	65	80	100	150	200	250	300	350	50	65	80	100	150	200	250	300	mm
L1 (BW)	8.50	10.00	12.00	16.00	22.00	28.00	34.00	39.00	42.00	11.00	13.00	14.50	18.00	24.00	30.00	36.00	41.00	in
L1 (BW)	216	254	305	406	559	711	864	991	1067	279	330	368	457	610	762	914	1041	mm
L (RF)	14.50	16.50	18.50	21.50	27.75	32.75	39	44.5	49.5	17.75	20.00	22.75	26.50	36.00	40.25	50	56	in
L (RF)	368	419	470	546	705	832	991	1130	1257	451	508	578	673	914	1022	1270	1422	mm
L2 (RTJ)	14.62	16.62	18.62	21.62	28.00	33.12	39.38	45.12	50.25	17.88	20.50	23.00	26.88	36.50	40.88	50.88	56.88	in
L2 (RTJ)	371	422	473	549	711	842	1000	1146	1276	454	514	584	683	927	1038	1292	1445	mm
H	9.50	9.50	11.88	15.38	18.00	20.62	24.00	27.00	30.00	10.25	10.25	13.75	16.12	18.88	22.38	25.25	32.00	in
H	240	240	300	390	455	525	610	685	760	260	260	350	410	480	570	640	815	mm
WT(kg)	22	37	45	78	245	530	815	1213	1555	55	78	95	182	300	630	825	1580	BW
WT(kg)	44	61	110	155	378	675	1160	1710	2315	93	130	170	315	618	1125	1760	2910	RF/RTJ