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Hangzhou Xiaoshan Chuangye Metal Processing Factory

Add:Zixia Village, Xintang Street, Xiaoshan District, Hangzhou City, Zhejiang Province, China

Contact:Yali Yu

Tel:86-571-82793342

Fax:86-571-82778852

Mobile:86-13967182887

E-mail:ada.huang@hzxscy.cn


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How To Operate The Manual Valve Correctly

A manual valve is a common type of valve used in equipment and equipment, which is operated through a handle and a handwheel. General handle, hand wheel clockwise rotation provisions of thorium close direction, reverse direction of opening for clockwise rotation regulation. But some valve opening and closing the opposite direction, before the operation should be paid attention to check the opening and closing after the operation.

The size of the manual valve, the handle and the handwheel is designed by the normal person. Therefore, the use of the valve is stipulated: the operator is not allowed to use the lever and long wrench to open and close the valve. At the same time, the length of the handle and the diameter of the handwheel are less than 320mm, only one person is allowed to operate. The handwheel with diameter equal to or exceed 320mm allows two people to operate together, or allows one person to operate with the proper lever (the general length is no more than 0.5m). But diaphragm valves, non metal valves are strictly prohibited to use lever or long spanner operation, and do not allow large, excessive force to close the valve.

Some operators use the lever and long spanner to operate the manual valve, and the better the closing force is, it is not in fact. This will cause premature valve damage and even cause accidents. Practice shows that: in addition to percussive hand wheel, suddenly too big too easy to damage the operation of the valve handwheel, handle, stem and sealing surface abrasions, and even crushed the sealing surface. Secondly, the handwheel, handle damaged or missing, should be promptly filled, not allowed to use wrenches alternative.

Valves such as gate valves and globe valves must be turned to 1/4~1/2 when closing or opening to the top (i.e., the lower dead point or the top dead center), so that the thread can be better sealed, so that it can be checked in advantageous operation so as not to tighten too tightly and damage the valve.

Large caliber butterfly valves, gate valves and cut-off valves are provided with bypass valves. The function of the bypass valve is to balance the pressure difference of the import and export, and reduce the opening moment. Open the bypass valve first, and then open the large valve.

Hangzhou Xiaoshan Chuangye Metal Processing Factory

Add:Zixia Village, Xintang Street, Xiaoshan District, Hangzhou City, Zhejiang Province, China

Contact us:Yali Yu

Tel:86-571-82793342

Fax:86-571-82778852

Mobile:86-13967182887

E-mail:hzxscyhdc@126.com


Contact Us
Hangzhou Xiaoshan Chuangye Metal Processing Factory

Address: Zixia Village, Xintang Street, Xiaoshan District, Hangzhou City, Zhejiang Province, China

Tel: +86-571-82793342

Fax: 86-571-82778852

E-mail: hzxscyhdc@126.com

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