Description

Technical Parameters

BRIEF DESCRIPTIONS

Full Nozzle Safety Valve of HFA44Y Series is a lever structure full nozzle reaction type relief valve designed for low and medium set pressure of gas and liquid applications. Its set pressure range is <10.0 MPa, maximal working temperature <300 DegreeC. The material selection can be carbon steel or stainless steel, and for stainless steel, the valve is able to handle with corrosive medium for both gas and liquid states.

	DESIGN
	Types: Stainless safety valve Full nozzle with open bonnet, with lever Available sizes: DN20(3、4") up to DN200(8") Available rating: PN16 up to PN160, Class 150# – 900# Medium: Steam under 350 DegreeC Blowdown: 7%~10% Discharge Coefficient: G-0.75 Connection Flange: ASME B16.5, GOST-12820, JIS Std
	FEATURES
	The solid nozzle screws into the body brings easy and convenient maintenance. The Allowable Tolerance of the Set Pressure: ≤±3% of the Set Pressure. Blowdown: ≤ 10% of the Set Pressure, Blowdown control is adjustable by nozzle ring. With lever structure accdording to requirement. The surface of both disc and nozzle seat is deposited with hard alloy of Stellite, and the excellent surface treatment by precision machining and lapping ensure the tightness and stable performance during the operation.

Construction	No	Part	Materail-1	Materail-2	Materail-3
	1	Nozzle	ANSI 420	CF8	CF8M
	2	Body	WCB	SS304	SS316
	3	Adjust Ring	ANSI 420	SS304	SS316
	4	Disc Holder	ANSI 420	SS304	SS316
	5	Disc	ANSI 420	SS304	SS316
	6	Guide	ANSI 420	ANSI 420	ANSI 420
	7	Bonnet	WCB	CF8	CF8M
	8	Spring	Alloy Steel	Alloy Steel	Alloy Steel
	9	Stem	ANSI 420	SS304	SS316
	10	Adjust Ring	ANSI 420	CF8	CF8M
	11	Cap	WCB	CF8	CF8M

DIMENSION AND SIZE

Type	Nominal Size,Flange,Pressure Grade, Connecting End Face					Structure Size			Weight
HFA44Y-150Lb	NPS	DN	Flange Std	Inlet Flange	Outlet Flange	L	L1	H	Kg
	3/4D1	20	ASME ANSI/ B16.5	Class150 NPS3/4RF	Class150 NPS1 RF	114	105	268	10.9
	1D2	25		Class150 NPS1 RF	Class150 NPS2 RF	114	105	268	10.9
	1E2	25		Class150 NPS1 RF	Class150 NPS2 RF	114	105	268	11.5
	1-1/2D2	40		Class150 NPS1-1/2 RF	Class150 NPS2 RF	121	124	290	15.1
	1-1/2G3	40		Class150 NPS1-1/2 RF	Class150 NPS3 RF	121	124	297	15.1
	1-1/2H3	40		Class150 NPS1-1/2 RF	Class150 NPS3 RF	124	130	410	28.8
	2J3	50		Class150 NPS2 RF	Class150 NPS3 RF	124	136.5	423	30.1
	3K4	80		Class150 NPS3 RF	Class150 NPS4 RF	162	155.5	430	45
	3L4	80		Class150 NPS3 RF	Class150 NPS4 RF	165	155.5	430	45.5
	4M6	100		Class150 NPS4 RF	Class150 NPS6 RF	184	178	530	81.9
	4N6	100		Class150 NPS4 RF	Class150 NPS6 RF	210	197	580	93
	4P6	100		Class150 NPS4 RF	Class150 NPS6 RF	229	181	665	115.3
	6Q8	150		Class150 NPS6 RF	Class150 NPS8 RF	241	240	755	174.8
	6R8	150		Class150 NPS6 RF	Class150 NPS8 RF	241	240	755	195
	8T10	200		Class150 NPS8 RF	Class150 NPS10 RF	279	276	1182	426

Type	Nominal Size,Flange,Pressure Grade, Connecting End Face					Structure Size			Weight
HFA44Y-300Lb	NPS	DN	Flange Std	Inlet Flange	Outlet Flange	L	L1	H	Kg
	3/4D1	20	ASME ANSI/ B16.5	Class300 NPS3/4 RF	Class150 NPS1 RF	114	105	268	11.4
	1D2	25		Class300 NPS1 RF	Class150 NPS2 RF	114	105	268	11.4
	1E2	25		Class300 NPS1 RF	Class150 NPS2 RF	114	105	268	11.4
	1-1/2D2	40		Class300 NPS1-1/2 RF	Class150 NPS2 RF	152	124	290	16.1
	1-1/2G3	40		Class300 NPS1-1/2 RF	Class150 NPS3 RF	152	124	297	17.1
	1-1/2H3	40		Class300 NPS1-1/2 RF	Class150 NPS3 RF	124	130	420	30.8
	2H3	50		Class300 NPS2 RF	Class150 NPS3 RF	124	130	420	31.5
	2J3	50		Class300 NPS2 RF	Class150 NPS3 RF	124	136.5	423	31.7
	3K4	80		Class300 NPS3 RF	Class150 NPS4 RF	162	155.5	506	59.5
	3L4	80		Class300 NPS3 RF	Class150 NPS4 RF	165	155.5	506	65
	4M6	100		Class300 NPS4 RF	Class150 NPS6 RF	184	178	530	89
	4N6	100		Class300 NPS4 RF	Class150 NPS6 RF	210	197	580	100
	4P6	100		Class300 NPS4 RF	Class150 NPS6 RF	254	206	670	162.6
	6Q8	150		Class300 NPS6 RF	Class150 NPS8 RF	241	240	760	179
	6R8	150		Class300 NPS6 RF	Class150 NPS8 RF	241	240	1046	326.8
	8T10	200		Class300 NPS8 RF	Class150 NPS10 RF	279	276	1182	456.6

Type	Nominal Size,Flange,Pressure Grade, Connecting End Face					Structure Size			Weight
HFA44Y-600Lb	NPS	DN	Flange Std	Inlet Flange	Outlet Flange	L	L1	H	Kg
	1D2	25	ASME ANSI/ B16.5	Class600 NPS1 RF	Class150 NPS2 RF	114	105	268	12.9
	1E2	25		Class600 NPS1 RF	Class150 NPS2 RF	114	105	268	13
	1-1/2F2	40		Class600 NPS1-1/2RF	Class150 NPS2 RF	152	124	290	18.3
	1-1/2G3	40		Class600 NPS1-1/2 RF	Class150 NPS3 RF	152	124	338	23.3
	2H3	50		Class600 NPS2 RF	Class150 NPS3 RF	162	154	420	32.5
	3K4	80		Class600 NPS3 RF	Class150 NPS4 RF	181	184	506	67.4
	4M6	100		Class600 NPS4 RF	Class150 NPS6 RF	203	178	675	121.6
	4N6	100		Class600 NPS4 RF	Class150 NPS6 RF	222	197	740	162.6
	4P6	100		Class600 NPS4 RF	Class150 NPS6 RF	254	225	1003	259.8
	6Q8	150		Class600 NPS6 RF	Class150 NPS8 RF	241	240	1046	323.7

Type	Nominal Size,Flange,Pressure Grade, Connecting End Face					Structure Size			Weight
HFA44Y-900Lb	NPS	DN	Flange Std	Inlet Flange	Outlet Flange	L	L1	H	Kg
	2H3	50	ASME ANSI/ B16.5	Class900 NPS2 RF	Class150 NPS3 RF	162	154	715	50
	3J4	80		Class900 NPS3 RF	Class150 NPS4 RF	181	184	695	74
	3K6	80		Class900 NPS3 RF	Class150 NPS6 RF	216	198	870	96
	4L6	100		Class900 NPS4 RF	Class150 NPS6 RF	222	197	890	150
	4M6	100		Class900 NPS4 RF	Class150 NPS6 RF	222	197	890	190
	4N6	100		Class900 NPS4 RF	Class150 NPS6 RF	222	197	930	220
	4P6	100		Class900 NPS4 RF	Class150 NPS6 RF	254	225	1100	240

STEAM PURPOSE SAFETY VALVE

Full Nozzle Safety Valve is used for steam purpose, and the ASME standard I and ASME standard VIII for boiler and pressure vessel applications provide the definition. The steam safety valve shall be full bore full nozzle design, usually open bonnet with lever, furthermore, in order to make sure the required capacity is reached. A safety valve must always be sized and able to vent any source of steam so that the pressure within the protected apparatus cannot exceed the maximum allowable accumulated pressure (MAAP).

STEAM PURPOSE SAFETY VALVE ARRANGEMENTS

Every steam boiler and every steam generator with a total heating surface of 50 m2 and above is to be provided with not less than two spring loaded safety valves of adequate capacity. For steam boilers and steam generators having heating surface less than 50 m2, only one safety valve need be fitted.

Where a superheater is an integral part of the boiler, at least one safety valve is to be located on the steam drum and at least one at the superheater outlet. The valves fitted at the superheater outlet may be considered as part of the boiler safety valves required, provided that their capacity does not account for more than 25% of the total capacity required, unless specially considered by the Society.

Where fitted, superheaters which may be shut-off from the boiler, are to be provided with at least one safety valve.

In the case of boilers fitted with a separate steam accumulator, safety valves may be fitted on the accumulator if no shut-off is provided between it and the boiler， and if the connecting pipe is of a size sufficient to allow the whole steam production to pass through, without increasing the boiler pressure more than 10% above the design pressure.

PRESSURE AND TEMPERATURE RATING TABLE

Temperature (Degree C)	(Lb) Class
	150	300	600	900	1500	2500
	Rated Working Pressure MPa (Bar)
29~38	1.96 (19.6)	5.11 (51.1)	10.21 (102.1)	15.32 (153.2)	25.53 (255.3)	42.55 (425.5)
50	1.82 (18.2)	5.01 (50.1)	10.02 (100.2)	15.02 (150.2)	25.04 (250.4)	41.73 (417.3)
100	1.77 (17.7)	4.64 (46.4)	9.28 (92.8)	13.91 (139.1)	23.19 (231.9)	38.65 (386.5)
150	1.58 (15.8)	4.52 (45.2)	8.05 (80.5)	13.57 (135.7)	22.61 (226.1)	37.69 (376.9)
200	1.40 (14.0)	4.38 (43.8)	8.76 (87.6)	13.15 (131.5)	21.91 (219.1)	36.52 (365.2)
250	1.21 (12.1)	4.17 (41.7)	8.34 (83.4)	12.52 (125.2)	20.66 (206.6)	34.77 (347.7)
300	1.02 (10.2)	3.87 (38.7)	7.75 (77.5)	11.62 (116.2)	19.37 (193.7)	32.28 (322.8)
350	0.84 (8.40)	3.70 (37.0)	7.39 (73.9)	11.09 (110.9)	18.48 (184.8)	30.80 (308.0)
375	0.74 (7.40)	3.65 (36.5)	7.29 (72.9)	10.84 (108.4)	18.23 (182.3)	30.39 (303.9)
400	0.65 (6.50)	3.45 (34.5)	6.90 (69.0)	10.35 (103.5)	17.25 (172.5)	28.75 (287.5)
425	0.56 (5.60)	2.88 (28.8)	5.75 (57.5)	8.63 (86.3)	14.38 (143.8)	23.96 (239.6)
450	0.47 (4.70)	2.00 (20.0)	4.01 (40.1)	6.01 (60.1)	10.02 (100.2)	18.89 (188.9)
475	0.37 (3.70)	1.35 (13.5)	2.71 (27.0)	4.06 (40.6)	6.77 (67.7)	11.28 (112.8)
500	0.28 (2.80)	0.88 (8.80)	1.76 (17.6)	2.64 (26.4)	4.40 (44.0)	7.33 (73.3)
525	0.19 (1.90)	0.52 (5.20)	1.04 (10.4)	1.55 (15.5)	2.59 (25.9)	4.32 (43.2)
540	0.13 (1.30)	0.33 (3.30)	0.65 (6.50)	0.98 (9.80)	1.63 (16.3)	2.72 (27.2)

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