美國(guó)阿姆斯壯外導(dǎo)式減壓閥
GP-2000 系列先導(dǎo)薄膜式蒸汽減壓閥
GP-2000 Externally Piloted Pressure-Reducing Valves
價(jià)格咨詢:, ,:,zhoujv
For steam service
The GP-2000 is a high-performance, externally piloted reducing valve for large-capacity requirements. Typical use is on intermittent service, including applications such as heat exchangers, steam coils, rotating dryers, process equipment and heating systems. With a 20:1 rangeability and high Cv, the GP-2000 is reliable and accurate (+/-1% of pressure set point from 5% to * of flow) over a long, trouble-free service life. Hardened stainless steel working parts are renewable in-line. The GP-2000 is single-seated for dead-end service, and it is available with both NPT (1/2"–2") (15–50 mm) and flanged connections in 2"–6" sizes (50–150 mm).
GP-2000 Externally Piloted Reducing Valve - Troubleshooting
When Downstream Pressure Continually Rises
Test main valve and pilot:
- Isolate valve
- Back adjusting bolt off
- Remove tubing from pilot and main valve
- Turn steam on
- If steam leaks at top port, the pilot may be dirty
- Replace pilot capsule K-2110
- If steam leaks at middle port, the main valve may be dirty
- Lap main valve and seat
過(guò)去,先導(dǎo)式減壓閥在其主閥操作部主要是使用活塞,但隨著時(shí)代的要求,蒸汽系統(tǒng)的質(zhì)量不斷提高,也要求減壓閥具有更高的控制性能。GP-2000蒸汽減壓閥在其主閥操作部取代活塞,使用膜片,先導(dǎo)薄膜式提高Cv值,對(duì)一次側(cè)壓力變化和二次負(fù)荷的變動(dòng)也具有更高的控制性能。
產(chǎn)自特點(diǎn)
zui大減壓比高這20: 1 , 過(guò)去的兩段減壓現(xiàn)在用一段即可實(shí)現(xiàn)。
由于膜片大,又采用外部檢測(cè)構(gòu)造,可以控制穩(wěn)定的二次側(cè)壓力。
由于Cv值大,流量及控制能力的飛躍提高, 比通常的公稱(chēng)通徑小
1~2個(gè)號(hào)碼的產(chǎn)品也可使用。
由于閥門(mén)為單球形,其密封性提高,滲漏量極少。
可管理0.02MPa以下的低壓。