D671FPneumatic plastic butterfly valve PN10 ~ PN16 has light weight and strong corrosion resistance. It has been used in many fields, such as pipeline system of general pure water and drinking water, drainage and sewage pipeline system, brine and sea water pipeline system, acid-base and chemical solution system, and its quality has been recognized by the majority of users. It has compact and beautiful structure, light weight, easy installation, strong corrosion resistance, wide application range, sanitary, non-toxic, wear-resistant, easy to disassemble, and easy to maintain.

D671FMain performance parameters of pneumatic plastic butterfly valve PN10 ～ PN16

Air driven	Compressed air 4-6bar (with handwheel)
Nominal diameter	50～300mm
Nominal pressure	1.0～1.6Mpa
Applicable temperature	0～+60℃
Connection mode	Counter clamp
Valve structure	Type A
body material	UPVC、CPVC、PP
Valve core material	UPVC、CPVC、PP、PTFE
Sealing material	FPM、EPDM、NBR
Applicable media	PVC compatible chemical solvents for food industry
	Limit switch, positioner, solenoid valve, pressure reducing valve

 

D671FExternal structure connection dimension of pneumatic plastic butterfly valve (mm) DN (mm) DN (in)（mm）LD1D2-ANSID2-JISD2-DIND3HN-φm-ANSIN-φm-JSIN-φm-DIN5024356.5120.391201251651034-194-194-18652 1/247.570139.441401451851134-194-194-1880347.579152.41501602011154-194-194-18100457.2103190.51751802291358-198-198-181255661302162102102571658-228-238-18150674151241.552402402851778-228-238-23200887.5200298.52902953432108-228-238-232501011025536235535041124012-2512-2512-233001212931143240040049029712-2512-2512-23

1. Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. If the configuration of driving device is electric or pneumatic, please refer to the manual of supporting drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.
11. If the valve is found to be open and closed abnormally, the cause shall be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force.