Do flow control orifice plates need to be installed on both the inlet and outlet pipes for cooling water? ?
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If flow control is needed, is it sufficient to install it only on the inlet pipe, or does it also need to be installed on both the inlet and return pipes? ? How much does a stainless steel orifice plate that reduces from DN80 to DN40 cost? ?
All you need to do is control the flow by installing one on the water inlet pipe; as for the price, just check the websites of various manufacturers online
If I install a flow restriction orifice plate that reduces the diameter from 80 to 40 on a DN80 pipe, can that section of pipe be considered a DN40 pipe? ? ? ? After installing the orifice plate, what pipe diameter should be used for hydraulic calculations? ?
To control the flow, installing valves or control valves might be better. Because aside from changes in operating conditions, as a cooler is used for an extended period of time, its heat transfer efficiency decreases due to factors such as dirt. To maintain an effective cooling effect, it is necessary to increase the amount of cooling water flow; this can be achieved using valves or control valves, but not with flow-limiting orifice plates.
It seems better to install the flow control device on the return pipe, to ensure that the cooler is filled with water and thus prevents vaporization from causing flow restrictions; a slight adjustment function can be achieved in conjunction with valves.
I don’t think it’s necessary to add a current-limiting blank board in general. In terms of design, attention should first be paid to selecting an appropriate pipe diameter; furthermore, by installing valves with a high resistance loss on the outlet pipe, such as globe valves, flow control and regulation can be achieved.
The issue now is the unreasonable design of the pipe diameter, which results in almost no flow reaching the equipment connected to the downstream branches; therefore, it is planned to control the flow at the upstream end in order to supply the downstream branches.
I agree with the opinions from posts 4 and 6. It is recommended that the poster avoid installing flow-limiting orifice plates (whether at the inlet or outlet); instead, a stop valve installed on the return pipe will suffice. The water flow can be adjusted by controlling the opening degree of the stop valve, and this method is simple to operate and does not require high costs. If a flow-limiting orifice plate is used, its adjustability is poor, which hinders the control of cooling water during actual operation.
I agree with the opinions from floor 4 and floor 6; installing flow-limiting orifice plates (whether at the inlet or outlet) lacks control flexibility. ”. . . The water volume can be adjusted by controlling the opening degree of the shut-off valve. . . “Personal opinion: a stop valve serves a stopping function. Using it to adjust the water volume will damage the valve seal. There is a certain risk to the maintenance workers during repairs. Is it prohibited to use stop valves for regulation in terms of design and plant management? Last edited by JoeWong on 2009-2-6 07:23 in this post.]