jinqhua 发表于 2021-5-2 12:15:47

过滤器压差要求

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。{:1110_549:}

shiyang 发表于 2021-5-2 12:15:47

牛逼饿了才踩踩踩踩踩踩踩踩踩踩踩踩

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 shutoffunless 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

{:1110_550:}
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