Selection of the discharge valve at the bottom of polyacrylamide
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For the valve at the bottom of the reaction tank, for economic reasons, a two-stage soft-sealed ball valve is currently used. The difference between soft sealing and hard sealing is quite significant; some people say that due to the high viscosity of the polymer after polymerization, soft sealing is not suitable, and they recommend half-ball or V-type ball valves with hard sealing as they are more cost-effective. Others suggest gate valves, but it is said that these types do not provide good sealing and are prone to leakage, plus they are large in size. So what should be chosen? Is a soft-sealed ball valve a viable option? Please, someone knowledgeable, tell me
Since you’re concerned about the price, you have to accept its drawbacks. If cost is not a concern, then a hard-sealed V-ball valve is of course the better choice!
Could we consider a hard-sealed, non-eccentric C valve? What are the pressures before and after the valve, and what is the approximate temperature? I can help you select the appropriate model
The two-stage soft-seal ball valve is more expensive than the V-type and hemispherical hard-seal types; I’m worried it might not work well, so I’m asking for advice
Around 100 degrees, fully open or fully closed; keep it fully open after polymerization is complete, then pressurize to extrude the colloid
Ceramic C valves could be considered; they have a self-cleaning function and can achieve a six-stage seal, with a nominal pressure of 600 lb, making them suitable for our application conditions