The disc should be opened form angle 5-10°(if not working.
The valve should be stocked indoor, and the prior temperature range is 0-25°((40-80F).
If stock in house, the valve should open and close every three minth.
To make sure no heavy loading on valve when transported and being stocked.
It is better to install lined butterfly valve in vertical pos的n and make the actuator direc廿y installed in the upside of butterfly valve, generally no inversion installed.
Lined butterfly valve when connected to check valve or pump, an expansion jiont will be needed to make sure the adjacent equipment won't be affected.
when install the lined butterfiy valve, the pipe should focus on center, and it will lead the disc extemal diameter impacting the inner diameter of pipe, causing the damage of disc edge, resulting in the torque increasing and causing leaking.
Both the disc and the shaft are lined by PFA/FEP. The shaft and the seal components are protected by PFA/FEP form the flow medium, and the bottom shaft also fully lined assures optimum corrosion resistance and dliminates a potential path.
The in-line resilient seat assembly assures optimum pressure distribution of the body liner to the disc assembly, providing tight sealing under all operating conditions. The wider seal-band provides a broader sealing area.
The body is splited and connected by hexagonal screw. When the valve operated long time,the fluorine plastic worn or shrinks, regulate the inner hexagonal screw, tighten the sealing and to ackieve the equal dffect of new valve (1-3mm reserved for regulation)
ISO 5211 actuation mounting pad ensures robust performance , while providing compact system design. Moreover, benefit of live loaded stem sealing sustem is atmospheric sealing integrity and no manual adjustment over the life of the valve.