Piston Check Valves - API 6D
​Sizes: 2" - 24"
​Classes: 150 - 2500

US Patent #11,365,820 

SCV Valve ​manufactures a premium array of check valves. Our  products are manufactured and tested in accordance with respective API, ASME, and ANSI standards.

SCV Piston Check Valves are quiet operating valves that effectively prevent backflow. The “flapperless” design is gentle on the seat as the piston rises and lowers with increased and decreased flow rates.

The SCV designs offers many features and options beneficial for oil, liquid gas, and liquid applications.

DESIGN & MANUFACTURING STANDARDS
Basic Design	API 6D
Wall Thickness	API 6D
Face-to-Face Dimensions	As stated
Flange End Dimensions	ANSI/ASME 16.5
Butt-Weld End Dimensions	ANSI/ASME B16.25
Inspection and Testing	API 6D

EXPANDED VIEWS & BILLS OF MATERIALS (Click link for information.)​
Piston Check Valve

DIMENSIONAL DATA (Click link for information.)​​
Class: 150; Sizes: 2" - 24"
Class: 300; Sizes: 2" - 16"
Class: 600; Sizes: 2" - 24"
Class: 900; Sizes: 2" - 12"
Class: 1500; Sizes: 2" - 12"
Class: 2500; Sizes: 2" - 12"

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Piston Check Valve - Expanded View (See "Bill of Materials" below)

Bill of Materials

No.	Part	WCC
1	Body	A216 WCC
2	Bonnet	A105
3	Piston	A105+Ni-Trid+St. 6
4	Seat	A105+St. 6
5	Cage	A105+ENP
6	Piston Ring	PEEK/Glass Filled
7	Stud	A193 B7M
8	Heavy Hex Nut	A193 2HM
9	O-ring	Viton AED
10	Bonnet Gasket	SS/Graphite
11	Vent Fitting	316 SS
12	Ball Check	316 SS
13	Orifice Fitting	316 SS
14	Lift Lug	Steel
15	Spring	X-750
All piston check valves 2” thru 6”, in all pressures, comes standard with a X-750 spring installed. Note: Available in other materials upon request.

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DIMENSIONAL DATA - PISTON CHECK VALVES

DIMENSIONAL DATA
Piston Check Valves - API 6D
​Sizes: 2" - 24"
​Class: 150

SIZE	IN	2	3	4	6	8	10	12	14	16	18	20	24
	MM	50	80	100	150	200	250	300	350	400	450	500	600
A - RF	IN	8.0	9.5	11.5	16	19.5	24.5	27.5	31	36	38.5	38.5	51
	MM	203	241	292	406	495	622	699	787	914	978	978	1295
H1	IN	3.25	4.875	5	6.75	9.25	11.75	13.25	14.875	17	/	/	/
	MM	83	124	127	171	235	298	337	378	432	/	/	/
H2	IN	7.0	8.35	10.23	14.56	17.83	22.48	25.51	27.25	30.125	/	/	/
	MM	178	212	260	370	451	571	648	692	765	/	/	/
WEIGHT (RF)	LB	64	124	201	332	610	1040	1328	2010	2480	/	/	/
	KG	29	56	91	151	277	472	602	912	1125	/	/	/

 

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DIMENSIONAL DATA
Piston Check Valves - API 6D
​​Sizes: 2" - 16"
​Class: 300

SIZE	IN	2	3	4	6	8	10	12	14	16	18	20	24
	MM	50	80	100	150	200	250	300	350	400	450	500	600
A-RF	IN	10.25	14.75	17.625	19.375	22.5	29.625	32	35.25	39.125	/	/	/
	MM	260	375	448	492	572	752	813	895	994	/	/	/
A- BW	IN	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	/	/	/
	MM	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	/	/	/
H1	IN	3.25	4.875	5	6.75	9.25	11.75	13.25	14.875	17	/	/	/
	MM	83	124	127	171	235	298	337	378	432	/	/	/
H2	IN	8.5	10.25	12.5	17.5	20.125	23.75	24.375	27.25	30.125	/	/	/
	MM	216	260	318	445	511	603	619	692	765	/	/	/
WEIGHT (RF)	LB	80	155	250	415	750	1300	1660	2500	3100	/	/	/
	KG	36	70	114	187	341	591	755	1136	1409	/	/	/
AUR = Available Upon Request

 

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DIMENSIONAL DATA
Piston Check Valves - API 6D
​Sizes: 2" - 24"
​Class: 600

SIZE	NPS	2	3	4	6	8	10	12	14	16	18	20	24
	DN	50	80	100	150	200	250	300	350	400	450	500	600
A - RF	IN	11	14.75	18.5	20.75	24	30.88	33.625	37	41.25	46	55.5	60
	MM	279	375	470	527	610	784	854	940	1048	1168	1410	1524
A - RTJ	IN	11.375	14.875	18.625	20.875	24.125	31	33.75	37.125	41.375	46.125	55.75	60.125
	MM	283	378	461	530	613	787	857	943	1051	1172	1413	1527
A - BW	IN	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR
	MM	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR	AUR
H1	IN	3.25	5.25	5.375	7	9.25	11.75	13.125	14.875	17	19.25	20.875	22.125
	MM	83	133	137	178	235	298	333	378	432	489	530	561
H2	IN	8.5	10.25	12.125	18	20.25	24.25	25.125	28.125	31.25	32.875	35.25	38.78
	MM	216	260	308	457	514	616	638	714	794	835	895	985
WGT (RF)	LB	71	136	215	485	782	1291	1880	2391	3788	/	5871	8507
	KG	32	62	98	220	355	586	853	1084	1718	/	2663	3858
AUR = Available Upon Request

 

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DIMENSIONAL DATA
Piston Check Valves - API 6D
​Sizes: 2" - 12"
​Class: 900

SIZE	NPS	2	3	4	6	8	10	12	14	16	18	20	24
	DN	50	80	100	150	200	250	300	350	400	450	500	600
A - RF	IN	/	14.875	19.375	21.875	24.875	31.375	33.875	/	/	/	/	/
	MM	/	378	492	556	632	797	860	/	/	/	/	/
A - RTJ	IN	/	15	19.5	22	25	31.5	33.125	/	/	/	/	/
	MM	/	381	495	559	635	800	857	/	/	/	/	/
A - BW	IN	/	AUR	AUR	AUR	AUR	AUR	AUR	/	/	/	/	/
	MM	/	AUR	AUR	AUR	AUR	AUR	AUR	/	/	/	/	/
H1	IN	/	5.25	5.375	7	9.25	11.75	13.125	/	/	/	/	/
	MM	/	133	137	178	235	298	333	/	/	/	/	/
H2	IN	/	10.25	12.125	18	20.25	24.25	25.125	/	/	/	/	/
	MM	/	260	308	457	514	616	638	/	/	/	/	/
WGT (RF)	LB	/	175	290	550	810	1650	2450	/	/	/	/	/
	KG	/	72	129	268	430	751	1044	/	/	/	/	/
AUR = Available Upon Request

 

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DIMENSIONAL DATA
Piston Check Valves - API 6D
​Sizes: 2" - 12"
​Class: 1500

SIZE	IN	2	3	4	6	8	10	12	14	16	18	20	24
	MM	50	80	100	150	200	250	300	350	400	450	500	600
A - RF	IN	13.625	17.25	20.25	24	32.375	34.375	41	/	/	/	/	/
	MM	346	438	514	610	822	873	1041	/	/	/	/	/
A - RTJ	IN	13.75	17.325	20.375	24.25	32.75	35	41.675	/	/	/	/	/
	MM	349	440	518	616	832	889	1059	/	/	/	/	/
A - BW	IN	AUR	AUR	AUR	AUR	AUR	AUR	AUR	/	/	/	/	/
	MM	AUR	AUR	AUR	AUR	AUR	AUR	AUR	/	/	/	/	/
H1	IN	3.25	5.25	5.375	7	9.25	11.75	13.125	/	/	/	/	/
	MM	83	133	137	178	235	298	333	/	/	/	/	/
H2	IN	8.5	10.25	12.125	18	20.25	24.25	25.125	/	/	/	/	/
	MM	216	260	308	457	514	616	638	/	/	/	/	/
WEIGHT (RF)	LB	111	207	362	803	1320	2183	2301	/	/	/	/	/
	KG	50	94	164	364	599	990	1044	/	/	/	/	/
AUR = Available Upon Request

 

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DIMENSIONAL DATA
Piston Check Valves - API 6D
​Sizes: 2" - 12"
​Class: 2500

SIZE	NPS	2	3	4	6	8	10	12	14	16	18	20	24
	DN	50	80	100	150	200	250	300	350	400	450	500	600
A - RF	IN	14.875	20.25	23.125	32	37.375	/	/	/	/	/	/	/
	MM	378	512	587	813	949	/	/	/	/	/	/	/
A - RTJ	IN	15	20.5	23.5	32.5	38	/	/	/	/	/	/	/
	MM	381	521	597	826	965	/	/	/	/	/	/	/
A - BW	IN	AUR	AUR	AUR	AUR	AUR	/	/	/	/	/	/	/
	MM	AUR	AUR	AUR	AUR	AUR	/	/	/	/	/	/	/
H1	IN	3.25	5.25	5.375	7	9.25	/	/	/	/	/	/	/
	MM	83	133	137	178	235	/	/	/	/	/	/	/
H2	IN	8.5	10.25	12.125	18	20.25	/	/	/	/	/	/	/
	MM	216	260	308	457	514	/	/	/	/	/	/	/
WEIGHT (RF)	LB	151	320	513	1327	2068	/	/	/	/	/	/	/
	KG	68	145	233	602	938	/	/	/	/	/	/	/
AUR - Available Upon Request

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