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陕西正捷工程科技有限责任公司是世界*仪器仪表生产厂家—美国 Dwyer 仪表中国地区的一级代理经销商，我们还是美国 WIKA,FEMA,UE,CCS 压力差压温度流量液位产品 .公司提供近万种有关差压表，差压变送器，差压开关，压力表，压力变送器，压力开关，流量计，流量传感器，流量开关，超声波流量计，风速计，风速变送器，温度、湿度、物位（液位）和阀门等产品, 它们广泛应用于工业自动化、暖通空调、楼宇自控、电厂、石油、化工、水处理，锅炉、压缩机、冷冻制冷设备、食品、医药、轻工业、环保、洁净工程等领域。我们代理多家*工业自动化测控仪表，将*的测控仪表提供给客户，同时我们拥有一支专业的技术队伍，能为客户提供较好的的自动化测控解决方案.公司自成立以来在电力化工行业取得了较好的业绩，赢得了供货商与使用客户的认可，参与了多个新建、扩建、改造项目，拥有国内外多个仪表的总代理、区域代理、一级代理资格。
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Explosion-Proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G. The Series H2 Dual-Action Explosion-Proof Pressure Switch is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases. The design consists of two concentric pistons operated by a single diaphragm with one pressure chamber. Each piston actuates a separate switch independent of the other. The switches may be adjusted to operate together, at opposite ends of the range or at two intermediate set points. The threaded top is removed to field adjust or service switches without disturbing electrical or pressure connections. The Duotect® switch is explosion-proof and weatherproof. It can be mounted in any position and is not affected by vibration
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 |
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