Dual-Action 防爆雙點壓力開關(guān) H2A
H2系列雙設(shè)定點防爆壓力開關(guān),可根據(jù)液體或氣體壓力的增加或減少,對兩種不同的動作進行排序。該設(shè)計包括兩個同心活塞操作一個單一的隔膜與一個壓力室。每個活塞帶動一個獨立的開關(guān)。開關(guān)可以調(diào)整到一起工作,在范圍的兩端或在兩個中間設(shè)置點。將螺紋頂部拆卸到現(xiàn)場調(diào)節(jié)或服務(wù)開關(guān)上,不會干擾電氣或壓力連接。Duotect®開關(guān)是防爆和耐候的。它可以安裝在任何位置,不受振動影響
Wetted Materials:
316 SS chamber with FEP diaphragm and Buna-N O-ring standard. Fluoroelastomer or EPDM O-ring optional.
Temperature Limit:
275°F (135°C). CSA approved: -20 to 90°C (-4 to 184°F).
Pressure Limit:
1500 psig (103 bar).
Enclosure Rating:
UL listed explosion-proof, Class I, Groups B, C, and D. Class II Groups E, F, and G. Meets NEMA 4X (IP66). CSA optional. Class I, Groups B, C & D. Class II, Groups E, F, & G -20°C ≤ Tamb ≤ 75°C T6 [optional -20°C ≤ Tamb ≤ 40°C T5] Type 4.
Switch Type:Two SPDT snap switches.
Electrical Rating:5 A @ 125/250 VAC, 5 A res., 3 A ind. @ 30 VDC. Gold contacts optional.
Electrical Connections:18 AWG, 18" (460 mm) long.
Conduit Connection:3/4" female NPT.
Process Connection:1/4" female NPT.
Mounting Orientation:Any position.
Set Point Adjustment:Internal nut.
Weight:2 lb (.9 kg).
Deadband:Approximately 10% of range.
Agency Approvals:CSA, UL.
Model | Description |
H2S-1 | Duotect® dual-action explosion-proof pressure switch, 3-40 psig (0.21-2.76 bar) low range, 5-75 psig (0.35-5.17 bar) high range |
H2S-2 | Duotect® dual-action explosion-proof pressure switch, 25-250 psig (1.72-17.2 bar) low range, 30-400 psig (2.07-27.6 bar) high range |
H2S-3 | Duotect® dual-action explosion-proof pressure switch, 100-1000 psig (6.89-68.9 bar) low range, 150-1500 psig (10.3-103 bar) high range |