DANFOSS RT Series เพรซเชอร์สวิตช์ (สวิตช์ควบคุมแรงดัน)
คุณสมบัติ
• ออกแบบเรียบง่าย
• มีความแม่นยำสูง
• ให้ผลลัพธ์ที่สม่ำเสมอ
• อายุการใช้งานยาวนาน
• ผ่านการรับรองมาตรฐานทางทะเลหลักๆ
• ระดับความปลอดภัย SIL 2 ตามมาตรฐาน IEC 61508
Technical data
| Designation | RT pressure switches |
| Ambient temperature | In general -50 – 70 °C |
| Diaphragm version -10 – 70 °C | |
| TÜV approved -40 – 70 °C | |
| Media temperature | In general -50 – 100 °C |
| Diaphragm version -10 – 90 °C | |
| TÜV appr. -40 – 150 °C | |
| Contact system | Single-pole changeover switch (SPDT), see Figure 22 |
| Contact load | Alternating current: AC-1: 10A, 400 V AC-3: 4A(1), 400 V |
| AC-15: 3A(1), 400 V | |
| Contact material: AgCdO | Direct current: |
| DC-13: 12 W, 220 V (see Figure 23) | |
| Special contact system | See Spare parts and accessories |
| Cable entry | 2 PG 13.5 for 6 – 14 mm diameter cables |
| Solid / stranded | 0.2 – 2.5 mm2 |
| Flexible, without ferrules | 0.2 – 2.5 mm2 |
| Flexible, with ferrules | 0.2 – 1.5 mm2 |
| Tightening torque | max. 1.5 Nm |
| Enclosure | IP66 acc. to IEC 529 and EN 60529. Units supplied with external reset. IP54. The thermostat housing is made of bakelite acc. to DIN 53470 Cover is made of polyamide. |
Dimensions
Pressure switches
(1) Preferred versions.
(2) Supplied with ø6 / ø10 mm weld nipple.
(3) With seal cap.
Pressure switches with adjustable neutral zone
(1) Preferred versions.
(2) Supplied with ø6 / ø10 mm weld nipple.
Differential pressure switches
(1) Preferred versions.
(2) Supplied with ø6 / ø10 mm nipple.
(3) Non-snap action contacts
(4) With SPST and SPDT contact system for alarm and cut off function at 0.8 and 1 bar.
Pressure switches for steam plant
The designation letters mean:
- A Units suitable for ammonia
- B Safety units with external reset
- S Safety units with internal reset
- W Units for control purposes
(1) Preferred versions.
