Yfa72W Vacuum Negative Pressure Safety Valve

• Media: Water Vapor Oils
• Certification: ISO
• Temperature: Ordinary Temperature
• Connection: Flange
• Pressure: Adjustable
• Closed: Open
• Model NO.: YFA72W
• Structure: Spring
• Material: Stainless Steel
• Transport Package: Wooden Box
• Specification: DN50-DN800
• Trademark: xc
• Origin: China
• HS Code: 84814000
• Production Capacity: 10000

Product Description

Detailed introduction
YFA72W vacuum negative pressure safety valve, when the negative pressure in the container exceeds the allowable value, the valve automatically opens and inhales air; When the negative pressure in the container reaches the allowable value, the valve automatically closes, so as to protect the equipment and system. Installed in the normal non-negative pressure system, when the container and the system of the release valve is not opened, resulting in negative pressure, the valve will automatically open.
Main parts materials

NO.	Part name	YFA72W-P material	YFA72W-R material
1	Valve body	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
2	Valve seat	1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
3	Regulating ring	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
4	Bonnet	ZG1Cr18Ni9Ti	1Cr18Ni9Ti
5	Stem	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
6	Spring	50CrVA	50CrVA coated with fluoroplastic

Key properties


 

Operating temperature	200 ºC or less
Suitable medium	YFA72W-10P is suitable for nitric acid medium
	YFA72W-10R is suitable for acetic acid medium

Overall dimensions and connection dimensions

Nominal diameter	Dimensions
	D	D1	D2	Z-ø d	b	f1	H
15	95	65	45	4-14	14	2	110
20	105	75	55	4-14	16	2	130
25	115	85	65	4-14	16	2	150
32	140	100	78	4 to 18	18	2	180
40	150	110	85	4 to 18	18	3	200
50	165	125	100	4 to 18	20	3	221
80	200	160	135	4 to 18	22	3	245
100	220	180	155	8 to 18	22	3	253
125	250	210	185	8 to 18	24	3	280
150	285	240	210	8-23	24	3	329
200	340	295	265	8-23	26	3	377
250	395	350	320	12-23	28	3	440