4. The pressure continues to rise after venting
This is mainly because the displacement of the selected safety valve is smaller than that of the equipment, and the appropriate safety valve should be re selected; If the center line of the valve rod is not aligned or the spring is rusted, so that the valve disc cannot be opened to the due height, the valve rod shall be reassembled or the spring shall be replaced; If the section of the exhaust pipe is not enough, the exhaust pipe conforming to the safe discharge area shall be adopted.
5. Disc frequency hopping or vibration
Mainly because the spring stiffness is too large, the spring with appropriate stiffness should be used; Improper adjustment of the adjusting ring makes the reseating pressure too high. Readjust the position of the adjusting ring; The resistance of discharge pipeline is too large, resulting in excessive discharge back pressure. Discharge pipe resistance shall be reduced.
6. The valve disc does not return to its seat after discharge
This is mainly caused by spring bending, incorrect installation position of valve stem and valve disc or being stuck, which shall be reassembled.

Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.

Major products: Butterfly Valve, Ball Valve,Gate Valve, Check Valve, Globe Vavlve,Y-Strainers, Electric Acurator , Pneumatic Acurators .

 For more interest, welcom to contact  at: Email: sales@nortech-v.com