Fushiman RPF12 type lift type safety relief valve

Model	Nominal diameter	fluid	Set pressure	Maximum operating temperature	Body Material	Connection
RPF12	15〜80	Steam/Gas/Liquid	0.02 to 1.6 MPa	220℃	FC,FCD	flange

The pop-up mechanism enables instant operation.
A spring suitable for the operating pressure is used, ensuring a high discharge capacity and stable operation.
It can be used as a highly reliable device for various pressure vessels, measuring instruments, and pressure piping systems to handle abnormal pressure increases.

RPF12

Specifications and Materials

Shape		Open Type with Lever	Sealed Type without Lever
Fluid		Steam, Air	Steam, Air, and Non-Corrosive Gas/Liquid	Water, Hot Water
Pressure		Set Pressure: 0.02–1.6 MPa (Back Pressure: Atmospheric Pressure)
Operating Temperature		0~220℃	0~220℃	0~Saturation Temperature
Maximum Usable Viscosity		—	20 mPa·s (at the operating temperature of the liquid)	—
Materials	Valve Body	Cast Iron (For 15A–40A JIS16K, Spheroidal Graphite Cast Iron)
	Valve Seat	Stainless Steel		Stainless Steel with Stellite Weld Overlay
	Valve Disc	Stainless Steel		Stainless Steel with Stellite Weld Overlay
	Valve Stem	Stainless Steel
	Spring Protection Tube	Cast Iron
	Adjustment Spring	Spring Steel, Piano Wire
	Lever	Cast Iron	—	—
	Cover	Cast Iron
	Adjustment Ring	Brass, Bronze
Application		Pressure vessels, headers, secondary side of pressure reducing valves, thermal relief, and other piping protection
Applicable Standards		Pressure Vessel Structural Standards

Nominal Diameter	Face-to-Face Dimension		With Lever	Without Lever	Pipe Connection: Flange Standard		Mass
Nominal Diameter	L	H1	H2	H2	Inlet	Outlet	Mass
15X 15	73	68	165	136	JIS 10K Full Face	JIS 10K Full Face	4.2
20 x 20	75	70	165	136			4.5
25 X 25	85	85	177	148			6.7
32 X 32	95	90	201	172			9.5
40 X 40	100	95	220	191			11.2
50 x 50	110	105	276	238			16.0
65 x 65	130	120	336	286			26.0
80 x 80	140	135	393	343			33.5
15X 20	75	83	172	143	JIS 16K Full Face	JIS 16K Full Face	4.7
20 x 25	75	85	172	143			5.4
25 X 32	90	90	187	158			7.5
32 x 40	95	95	212	183			10.0
40 X 50	100	105	235	206			13.0
50 X 65	115	115	288	250			17.6
65 X 80	130	130	353	303			27.3
80X100	145	145	408	358			38.7

RPF12 Type・RPF13 Type Saturated Steam Discharge Capacity (According to Pressure Vessel Structure Regulations)

Nominal Diameter			15-20	25	32	40	50	65	80
Seat Bore Diameter D (mm)			21	26	33	41	51	66	81
Lift l (mm)			0.6	0.7	0.9	1.1	1.3	1.7	2.1
Blowout Area A (mm²)/Set Pressure (MPa·G)	Coefficient C	Set Pressure (MPa·G)	39.5	57.1	93.3	141.6	208.2	352.4	534.3
0.1	1.000		40	58	95	144	212	359	544
0.2	1.000		58	84	138	209	308	522	791
0.3	1.000		78	113	185	282	414	701	1064
0.4	1.003		99	143	234	355	522	884	1340
0.5	0.999		118	171	280	425	626	1059	1606
0.6	0.995		138	199	326	495	729	1234	1871
0.7	0.991		157	228	372	565	831	1407	2133
0.8	0.987		176	255	417	634	932	1578	2393
0.9	0.985		196	283	463	704	1035	1752	2656
1.0	0.983		215	311	509	773	1137	1925	2919
1.1	0.980		234	339	554	841	1237	2095	3177
1.2	0.978		254	367	600	910	1339	2266	3436
1.3	0.976		273	394	645	979	1439	2437	3695
1.4	0.975		292	422	690	1048	1541	2609	3957
1.5	0.974		311	450	736	1117	1643	2782	4218
1.6	0.973		331	478	782	1186	1745	2953	4478
1.7	0.972		350	506	827	1255	1846	3125	4738
1.8	0.971		369	534	872	1324	1947	3296	4998
1.9	0.970		388	561	917	1393	2048	3467	5257
2.0	0.970		408	590	964	1463	2151	3641	5521

RPF12 Type・RPF13 Type・RPS16 Type・RPS17 Type Air Discharge Capacity (According to Pressure Vessel Structure Regulations, at 20°C)

Nominal Diameter	15-20	25	32	40	50	65	80
Seat Bore Diameter D (mm)	21	26	33	41	51	66	81
Lift l (mm)	0.6	0.7	0.9	1.1	1.3	1.7	2.1
Blowout Area A (mm²)/Set Pressure (MPa·G)	39.5	57.1	93.3	141.6	208.2	352.4	534.3
0.1	65	94	153	233	343	581	881
0.2	94	137	223	339	499	845	1282
0.3	127	184	300	456	671	1136	1723
0.4	159	231	377	573	843	1427	2163
0.5	192	278	454	690	1014	1717	2604
0.6	225	325	531	807	1186	2008	3045
0.7	257	372	608	923	1358	2299	3486
0.8	290	419	685	1040	1530	2590	3926
0.9	322	466	762	1157	1701	2880	4367
1.0	355	513	839	1274	1873	3171	4808
1.1	388	560	916	1391	2045	3462	5249
1.2	420	608	993	1507	2217	3752	5690
1.3	453	655	1070	1624	2388	4043	6130
1.4	485	702	1147	1741	2560	4334	6571
1.5	518	749	1224	1858	2732	4625	7012
1.6	550	796	1301	1975	2904	4915	7453
1.7	583	843	1378	2092	3076	5206	7893
1.8	616	890	1455	2208	3247	5497	8334
1.9	648	937	1532	2325	3419	5787	8775
2.0	681	984	1609	2442	3591	6078	9216

RPF12 Type・RPF13 Type・RPS16 Type・RPS17 Type Air Discharge Capacity (According to High-Pressure Gas Safety Act, at 20°C)

Nominal Diameter	15-20	25	32	40	50	65	80
Seat Bore Diameter D (mm)	21	26	33	41	51	66	81
Lift l (mm)	0.6	0.7	0.9	1.1	1.3	1.7	2.1
Set Pressure (MPa·G)/Blowout Area A (mm²)	0.395	0.571	0.933	1.416	2.082	3.524	5.343
0.1	61	89	145	221	324	550	833
0.2	93	135	221	336	495	838	1270
0.3	126	182	298	452	665	1126	1707
0.4	158	229	374	568	835	1414	2144
0.5	190	275	450	684	1005	1702	2581
0.6	223	322	527	799	1176	1990	3018
0.7	255	369	603	915	1346	2278	3454
0.8	287	415	679	1031	1516	2566	3891
0.9	320	462	755	1147	1686	2854	4328
1.0	352	509	832	1262	1856	3143	4765
1.1	384	555	908	1378	2027	3431	5202
1.2	416	602	984	1494	2197	3719	5639
1.3	449	649	1060	1610	2367	4007	6075
1.4	481	696	1137	1726	2537	4295	6512
1.5	513	742	1213	1841	2708	4583	6949
1.6	546	789	1289	1957	2878	4871	7386
1.7	578	836	1366	2073	3048	5159	7823
1.8	610	882	1442	2189	3218	5447	8260
1.9	642	929	1518	2304	3388	5736	8696
2.0	675	976	1594	2420	3559	6024	9133

RPF12 Type・RPF13 Type Water Discharge Capacity (According to General Discharge Capacity Calculation Formula)

Nominal Diameter	15-20	25	32	40	50	65	80
Seat Bore Diameter D (mm)	21	26	33	41	51	66	81
Lift l (mm)	0.6	0.7	0.9	1.1	1.3	1.7	2.1
Set Pressure (MPa·G)/Blowout Area A (mm²)	39.5	57.1	93.3	141.6	208.2	352.4	534.3
0.1	1349	1950	3186	4836	7110	12035	18248
0.2	1907	2757	4506	6839	10056	17020	25806
0.3	2336	3377	5519	8376	12316	20846	31606
0.4	2698	3900	6372	9672	14221	24071	36496
0.5	3016	4360	7125	10813	15900	26912	40803
0.6	3304	4776	7805	11845	17417	29481	44698
0.7	3569	5159	8430	12795	18813	31843	48279
0.8	3815	5515	9012	13678	20112	34041	51613
0.9	4047	5850	9559	14508	21332	36106	54744
1.0	4266	6166	10076	15293	22486	38059	57705
1.1	4474	6467	10568	16039	23583	39917	60522
1.2	4673	6755	11038	16752	24632	41692	63213
1.3	4864	7031	11489	17436	25638	43395	65794
1.4	5047	7296	11922	18095	26605	45033	68278
1.5	5224	7552	12341	18730	27539	46613	70674
1.6	5396	7800	12745	19344	28442	48142	72992
1.7	5562	8040	13138	19939	29318	49624	75238
1.8	5723	8273	13519	20517	30168	51062	77420
1.9	5880	8500	13889	21080	30994	52461	79541
2.0	6033	8721	14250	21627	31800	53824	81607

Notes:

The discharge capacity calculation formula is based on the vent well calculation formula in the High-Pressure Gas Safety Act.
This table applies to cases where the back pressure of the discharge outlet is atmospheric pressure and the overpressure is 25%.
If G ≠ 1, multiply the values in the table by the G value to obtain the required discharge capacity.