A21f Spring Micro-Open External Thread Safety Valve

• Media: Water Vapor Oils
• Certification: ISO
• Temperature: Ordinary Temperature
• Connection: Thread
• Pressure: Adjustable
• Closed: Semi-Closed
• Model NO.: A21F
• Structure: Spring
• Material: Stainless Steel
• Transport Package: Wooden Box
• Specification: DN15-DN800
• Trademark: xc
• Origin: China
• HS Code: 84814000
• Production Capacity: 10000

Product Description

Product parameter
A21F, A21H, A21W, A21Y spring micro-open external thread safety valve is suitable for air, ammonia, petroleum gas with working temperature ≤200ºC...... And other media equipment or pipeline. A21W-P, R type is suitable for corrosive gas or liquid temperature ≤200ºC equipment or pipeline, as overpressure protection device. KA21Y type is suitable for liquefied petroleum gas with temperature ≤100ºC.
Main parts materials:

NO.	Part name	A21H-C/A21F material	A21W-P/A21F-P material	A21Y-R material
1	Pipe fittings	20	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
2	Pipe union nut	35	2Cr13	1Cr18Ni9Ti
3	Valve seat	35	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
4	Valve body	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
5	Valve flap	2Cr13/2Cr13+PTFE	1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE	1Cr18Ni12Mo2Ti
6	Spring seat	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
7	Spring	50CrVA	50CrVA coated with fluoroplastic	50CrVA is coated with fluoroplastic
8	Lock nut	Q235-A	ZG230-450	1Cr18Ni9Ti
9	Spring guide pad	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
10	Adjusting nuts	Q235-A	2Cr13	1Cr18Ni12Mo2Ti
	Sealing surface material	"Y" type surfacing Co based carbide,"H" type surfacing D507,"W" type for the valve body

Overall dimensions and connection dimensions:

Model number	Nominal diameter	do	d	Do	M	d1	D1	L	L1	≈H
KA21-16C A21H-16C A21H-40  A21W-16P  A21W-40P KA21-16P	15	12	15	20	M27 x 1.5	G1/2"	30	35	76	66
	20	16	20	25	M33 x 1.5	G3/4"	35	40	87	68
	25	18	25	31	M39 x 1.5	G1"	40	50	100	105
A21Y-64 A21Y-64P A21Y-100 A21Y-100P	15	10	15	25	M39 x 1.5	G1"	44	50	100	66
	20	10	20	31	M39 x 1.5	G1"	44	50	100	68
	25	12	25	31	M39 x 1.5	G1"	44	50	100	105
A21W-160/160P	15	8	20	/	M24×2	G1"	44	50	100	261
	20	8	25	/	M33×2	G1"	44	50	100	261
	25	8	28	/	M36×2	G1"	44	50	100	285