API Flanged Swing Check Valve – Cast Steel / Stainless, Class 150-2500, API 6D

API Flanged Swing Check Valve – Cast Steel / Stainless, Class 150-2500, API 6D

Flanged swing check valve is a kind of automatic valve, used to prevent the medium in the pipeline backflow. When the medium flows, the valve flap opens due to fluid pressure, allowing the medium to pass; when the medium stops flowing or backs up, the valve flap closes under the action of fluid pressure and its own gravity, preventing the medium from flowing backwards. This valve is widely used in petroleum, chemical, water treatment, electric power and other industries.

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Product Information

Performance parameters

Serial number	project name	parameter
1	Nominal pressurePN（MPa)	150LB	300LB	600LB	900LB	1500LB	2500LB
1	Nominal pressurePN（MPa)	2.0	5.0	10.0	15.0	25.0	42.0
2	Shell strength test pressure	Nominal pressure at room temperature 1.5 times
3	High pressure seal test pressure	Nominal pressure at room temperature 1.1 times
4	Working pressure at room temperature	Press the ASME B16.34 pressure and temperature rating

Product specifications

design standards	Structure length	Flange connection size	Test and inspection	Pressure and temperature reference
API6D/ASME B16.34	ASME B16.10	ASME B16.5	API598/API6D	ASME B16.34

The main part material

Part Name	Material name
Body	A216 WCB	A217 WC6	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
cap	A216 WCB	A217 WC6	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Valve plate	A216 WCB	A217 WC6	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Sealing surface	13Cr/STL	STL	Body / STL	Body / STL	Body / STL	Body / STL
Valve shaft	A182 F6a	A182 F11	A182 F304	A182 F316	A182 F304L	A182 F316L
Gasket	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite	Flexible graphite
bolt	A193 B7	A193 B16	A193 B8	A193 B8M	A193 B8	A193 B8M
Nut	A194 2H	A194 4	A194 8	A194 8M	A194 8	A194 8M
Operating temperature	-29~425℃	-29~540℃	-46~425℃	-46~425℃	-46~425℃	-46~425℃
Suitable media	steam	steam	Weak corrosive	Weak corrosive	Weak corrosive	Weak corrosive

The main shape and connection dimensions

Nominal diameter		size
m	in	L	D	D1	D2	b	f	n-Φd	H
H44H-150Lb
50	2	203	152	120.5	92	16	1.6	4-19	180
80	3	241	192	152.5	127	19	1.6	4-19	190
100	4	297	229	190.5	157	24	1.6	8-19	203
125	5	330	254	216	186	24	1.6	8-22	229
150	6	356	279	241.5	216	26	1.6	8-22	257
200	8	495	342	298.5	270	29	1.6	8-22	292
250	10	622	406	362	324	31	1.6	12-25	355
300	12	698	483	432	381	32	1.6	12-25	396
H44H-300Lb
50	2	267	165	127	92	23	1.6	8-19	178
80	3	318	210	168.5	127	29	1.6	8-22	216
100	4	356	254	200	157	32	1.6	8-22	241
125	5	400	279	235	186	35	1.6	8-22	267
150	6	444	318	270	216	37	1.6	12-22	305
200	8	533	381	330	270	42	1.6	12-25	368
250	10	622	445	387	324	48	1.6	16-29	394
300	12	711	521	451	381	51	1.6	16-32	445
H44H-600Lb
50	2	295	165	127	92	33	6.4	8-19	203
80	3	359	210	168	127	36	6.4	8-22	235
100	4	435	273	216	157	45	6.4	8-25	286
125	5	511	330	266.5	186	52	6.4	8-29	292
150	6	562	356	292	216	55	6.4	12-29	330
200	8	664	419	349	270	63	6.4	12-32	381
250	10	791	510	432	324	71	6.4	16-35	457
300	12	842	559	489	381	74	6.4	20-35	584