KA41, KA42 Sulfur Resistant Safety Valve

Size Range: 1" ~ 6"
Pressure Rating: PN16 – PN100
Temperature Range: –29°C ~ 200°C
Connection Type: Flanged
Material: Carbon Steel / Stainless Steel
Operation: KA41: Automatic Low-Lift Relief on Over-pressure (Lift Height ≤1/40 of Throat Diameter); KA42: Automatic Full-Lift Relief on Over-pressure (Lift Height ≥1/4 of Throat Diameter)
Suitable Medium: H₂S-Containing Natural Gas, Oilfield Associated Gas, Acidic Oil and Gas Media

Key words:

E-mail:

zgkk@zgkkv.com

Message

Details

Our products now cover a wide range of standardized fluid control products that can be adapted to a variety of drive modes, comprising ball valves, butterfly valves, gate valves, globe valves, check valves, safety valves, rotary ball valves, plunger valves etc. Our products are widely used in water conservancy, municipal, electric power, gas, petrochemical, coal chemical, energy, environmental protection, medicine, real estate, metallurgy, mining and many other fields.

The KA41 and KA42 series sour service safety valves are spring loaded, closed bonnet, full-lift safety valves designed for acidic and sulfur-containing media such as sour natural gas, with a maximum working temperature of 200°C.
They are installed on equipment and piping systems to provide reliable over-pressure protection, featuring optimized design and materials suitable for corrosive service conditions.

Main Performance Parameters
Model	Set Pressure Pk / MPa	Seat Tightness Test Pressure / MPa	Discharge Pressure / MPa	Reseating Pressure / MPa	Lift Height / mm	Applicable Temperature / °C	Applicable Medium	Discharge Coefficient
KA42Y-16C KA42Y-16P	Pk=0.1-1.6	When Pk ≤ 0.3: Pk − 0.03 When Pk ＞ 0.3: 90% of Pk	≤ 1.1 × Pk	≥ 85% of Pk	≥ 1/4 of Throat Diameter	-29-121	Sour Natural Gas	0.7
KA42Y-16C KA42Y-16P	Pk=0.1-1.6
KA42Y-40 KA42Y-40P	Pk=1.3-4.6
KA42Y-40 KA42Y-40P	Pk=1.3-4.6
KA42Y-64 KA42Y-64P	Pk=3.2-6.4
KA42Y-64 KA42Y-64P	Pk=3.2-6.4
KA42Y-100 KA42Y-100P	Pk=5.0-10
KA42Y-100 KA42Y-100P	Pk=5.0-10

Main Parts & Materials
Model	Part Name
Model	Body	Seat / Guide Sleeve	Spring	Adjusting Screw
KA42Y-16C KA42Y-40 KA42Y-64 KA42Y-100	Carbon Steel	Cr-Ni-Ti Stainless Steel	50CrVA (Fluoroplastic Coated)	Carbon Steel
KA42Y-16P KA42Y-40P KA42Y-64P KA42Y-100P	Cr-Ni-Ti Stainless Steel		50CrVA (Fluoroplastic Coated)	Chromium Stainless Steel

Dimensions (mm)
KA42Y-16C，KA42Y-16P，KA42Y-25，KA42Y-25P
Nominal Diameter (DN)	Dimensions /mm										Weight /kg
Nominal Diameter (DN)	L	L1	D	D1	D2	b	Z-φd	d0	H	Discharge Flange	Weight /kg
25	100	95	115	85	65	16	4-φ14	15	250	PN16 DN32	10
32	115	100	140	100	78	18	4-φ18	20	277	PN16 DN40	11
40	120	110	150	110	84	18	4-φ18	25	281	PN16 DN50	13
50	135	120	165	125	99	20	4-φ18	32	307	PN16 DN65	15
80	170	135	200	160	132	20	8-φ18	50	429	PN16 DN100	40
100	200	160	220	180	158	22	8-φ18	65	530	PN16 DN125	61
150	250	210	280	240	210	24	8-φ23	100	675	PN16 DN200	120

KA42Y-40，KA42Y-40P
Nominal Diameter (DN)	Dimensions /mm											Weight /kg
Nominal Diameter (DN)	L	L1	D	D1	D2	D6	b	Z-φd	d0	H	Discharge Flange	Weight /kg
25	100	95	115	85	65	58	16	4-φ14	15	250	PN16 DN32	11
32	115	100	140	100	76	66	18	4-φ18	20	287	PN16 DN40	12
40	120	110	150	110	85	76	18	4-φ18	25	291	PN16 DN50	15
50	135	120	165	125	100	88	20	4-φ18	32	335	PN16 DN65	19
80	170	135	200	160	135	121	22	8-φ18	50	503	PN16 DN100	54
100	200	160	220	180	160	150	24	8-φ23	65	580	PN16 DN125	75
150	250	210	280	240	218	204	30	8-φ25	100	742	PN16 DN200	162

KA42Y-64，KA42Y-64P
Nominal Diameter (DN)	Dimensions /mm											Weight /kg
Nominal Diameter (DN)	L	L1	D	D1	D2	D6	b	Z-φd	d0	H	Discharge Flange	Weight /kg
40	135	120	165	125	95	76	24	4-φ23	25	346	PN16 DN50	30
50	160	130	175	135	105	88	26	4-φ23	32	368	PN16 DN65	35
80	175	160	210	170	140	121	30	8-φ23	50	500	PN16 DN100	80
100	220	200	250	200	168	150	32	8-φ25	65	835	PN16 DN125	110

KA42Y-100，KA42Y-100P
Nominal Diameter (DN)	Dimensions /mm											Weight /kg
Nominal Diameter (DN)	L	L1	D	D1	D2	D6	b	Z-φd	d0	H	Discharge Flange	Weight /kg
40	135	120	165	125	95	76	26	4-φ23	25	346	PN16 DN50	30
50	160	130	175	135	105	88	28	4-φ25	32	368	PN16 DN65	34
80	175	160	210	170	140	121	34	8-φ25	50	500	PN16 DN100	80
100	220	200	250	200	168	150	38	8-φ30	65	835	PN16 DN125	110
150	285	260	350	290	250	204	46	12-φ34	100	890	PN16 DN200	170