Due to the characteristics of the WFGD project, it is decided to transport the slurry at a higher temperature, with bubbles and with a large amount of solid particles. Therefore, due to the evaporation of the slurry and the concurrent collapse of the bubble, it causes special vibrations and pressure fluctuations of gas condensation and evacuation, which will affect the safe operation of the pump. The following two aspects need to be taken into account: 1. The blockage of the gas to the runner will cause a decrease in pump flow, lift and efficiency. 2. Bubble material rupture in the material caused by the loss (cavitation), to choose a strong anti-cavitation materials. Here are some of the material's anti-cavitation properties. Material Designation Material No. Index Weight loss Castiron GG25 0.6025 1 Cast steel GS-C25 1.0619 0.8 Cast chromium steel G-X20Cr14 1.4027 0.2 Cast CrNi steel G-X6CrNi189 1.4308 0.05 NORIDUR G-X3CrNiMoCu246 9.4460 0.02 Cavitation can cause the following problems 1. Reduce Bearing life. 2. Cause damage to the impeller inlet area. 3. Damaged pump shaft. 4. Mechanical seal contact surface damage, causing leakage. 5. The noise rises, it seems, is conveying round hard particles.
Pneumatic Butterfly Valve
Pneumatic Butterfly Valve is operated by pneumatic actuator, the actuator have two types, single acting type and spring return type. According to different working condition, the valve can be made by material PVDF, CPVC, PVC, PP, PPH, lined PTFE and Lined rubber, connection by flange, wafer and lug, as per standard DIN, ANSI, BS, size from 2" to 40". pressure rate by PN10, PN16, 150LB.
Ningbo RMI Plastic Co., Ltd. offer Electric Butterfly Valve with specification:
Size: DN50~DN1000 (2 inch ~ 40 inch)
Connection: wafer, lug, flange ANSI CL150, JIS10K, DIN PN10
Material: PVC-U; PVC-C; PVDF; FRPP; PP-H, WCB, CI
Actuator: Pneumatic
Type: Spring return, double acting
Air supply: 4~6bar
Pneumatic Butterfly Valve,Butterfly Valve Pneumatic,Pneumatic Control Butterfly Valve,Control Valve
Ningbo RMI Plastic Co.,Ltd , https://www.rmiplast.com
