过滤器压差要求

jinqhua · 发表于 2021-5-2 12:15:47

1. Filters: Replaceable elements,five micron or smaller particle retention. Static pressure capability two timesthe maximum lockup pressure of nearest upstream pressure regulator. Maximumpressure loss, at full flow, 1.3 kPa (5 inches WG). Provide unions for filterremoval.

ma730060 · 发表于 2021-5-2 12:15:47

关注之中。

shiyang · 发表于 2021-5-2 12:15:47

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wxch99219 · 发表于 2021-5-2 12:15:47

谢谢楼主分享！

jinqhua · 发表于 2021-5-2 12:15:47

谁来解释一下 lockup pressure

jinqhua · 发表于 2021-5-2 12:15:47

Common Causes of High Regulator Lockup
A regulator’s lockup pressure refers to the pressure increase in the regulator’s outlet pressure above setpoint required to shut the regulator off tight. Most product documentation does not list expected lockup pressures because many of the factors that affect lockup are installation-dependent. Lockup pressures could be elevated when exposed to low temperatures, dirty process fluid, rapid on/off flow demand, small downstream volume, and aged elastomers. When troubleshooting an installation that appears to have higher than expected lockup pressure, first evaluate whether any of the before mentioned conditions could be causing the concern.

Common Causes

Excessive lockup can occur if the valve plug and orifice are not fully sealing. The valve plug or orifice could be scratched or debris could be keeping them from tightly sealing. In pilot-operated regulators, both the pilot and the main valve should be inspected unless you can isolate which one is leaking by closing a block valve on the pilot bleed line.
If setpoint was made at high flow, higher than anticipated lockup pressures could result. Establishing setpoint at a small, nominal flow is the best practice for setting the regulator. Because self-operated regulators are less accurate than pilot-ops, the flow rate at which setpoint is made makes a bigger difference. The figure below shows the increase in lockup pressure associated with a regulator set at a high flow rate.
If the maximum pressure drop or maximum inlet ratings are exceeded, the lockup could be elevated. The force from the outlet pressure on the regulator diaphragm provides the force needed to achieve shutoff unless overpowered by the force from the higher than recommended inlet pressure on the valve plug.
If any of the regulator’s moving parts are galled, bent, or damaged, the regulator could have high lockup pressures.

llzhao · 发表于 2021-5-2 12:15:47

取决于滤芯和过滤器的设计值

1042960171 · 发表于 2021-5-2 12:15:47

666666666

wutuxiaoyuan · 发表于 2021-5-2 12:15:47

感谢分享积极讨论！

hubaolin · 发表于 2021-5-2 12:15:47

与滤料物性有关

gpcshf · 发表于 2021-5-2 12:15:47

got it , thanks

smxbjf · 发表于 2021-5-2 12:15:47

加强英语学习！

wunhua2004 · 发表于 2021-5-2 12:15:47

取决于滤芯和过滤器的设计值
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zhoucch · 发表于 2021-5-2 12:15:47

xuexi l

gpcshf · 发表于 2021-5-2 12:15:47

good,thanks

xushifu210 · 发表于 2021-5-2 12:15:47