DemoSistem ini masih dalam tahap demo dan bukan layanan resmi. Data dapat dihapus kapan saja, dan pesanan, penawaran, serta pembayaran tidak berlaku sungguhan. Jangan memasukkan data kartu asli atau informasi pribadi yang sensitif.

Kembali ke basis pengetahuan

Standar

56 tayangan

Set Pressure vs. Cold Differential Test Pressure — A Field Guide

set pressureCDTPback pressurebench test

The short answer

Cold differential test pressure (CDTP) compensates the bench set point for the temperature and back-pressure the valve will see in service.

Rules of thumb

For conventional valves, add the superimposed back pressure to the desired set pressure.
Correct for temperature when service exceeds 120 C, using the manufacturer chart.
Balanced-bellows valves already negate most back-pressure effects — check the datasheet first.

Common mistakes

Applying CDTP to pilot-operated valves without checking the pilot dome rating, and forgetting that CDTP changes when the process conditions change.