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The rotary disc valve is designed for use as a shut-off or control valve for flow control in heat supply systems, water supply, in technological processes in the food, chemical, oil and gas, pulp and paper and other industries.
Operating principle: The valves open and close by turning the disk by 90°. Opening is done by turning the handle counterclockwise, closing - clockwise.
Limit switches are designed to monitor the position of the disk of rotary disc valves with a handle in control and automation systems. The operating principle of the limit switch is based on mechanical action on the actuator, which results in closing or opening of the electrical circuit.
| Characteristic | Meaning |
| Shutter type | rotary disc |
| Diameter | 40-200 mm |
| Nominal pressure | 16 bar |
| Working environment temperature | from -20 to +110°C |
| Application | water supply, heat supply, chemical industry, oil and gas industry, food industry |
| Connection type | interflange |
| Control type | Manual (handle, gearbox) |
| Sealing class | A |
| Service life | 10 years |
| Guarantee | 12 months |

| Characteristic | Meaning |
| Limit switch model | LS-103 |
| Nominal voltage | 250V |
| Maximum switching current | 6A |
| Frequency | 50 Hz |
| Contact configuration | N/Z + N/O instant action |
| Ambient temperature | from -5℃ to +65℃ |
| Degree of protection | IP64 |
| Body material | plastic |
| Head movement | linear (plunger) |
| Permissible humidity | 95% |
| Contact resistance | 25 Mohm (initial value) |
| Nominal insulation resistance | 100 Mohm (500 VDC) |
| Cable entry | max Ø12 mm |

| Diameter | L, mm | H, mm | H1, mm | D2, mm | D1, mm | nd, mm |
| DN40 | 43 | 147 | 70 | 92 | 125 | 4-23 |
| DN50 | 43 | 147 | 70 | 92 | 125 | 4-23 |
| DN65 | 46 | 155 | 76 | 110 | 145 | 4-23 |
| DN80 | 46 | 164 | 92 | 121 | 160 | 8-20 |
| DN100 | 52 | 175 | 106 | 153 | 180 | 4-23 |
| DN125 | 56 | 194 | 119 | 176 | 210 | 4-23 |
| DN150 | 56 | 206 | 132 | 207 | 240 | 4-25 |
| DN200 | 60 | 237 | 162 | 259 | 295 | 4-25 |
| DN250 | 68 | 282 | 200 | 316 | 355 | 4-28 |
| DN300 | 78 | 311 | 225 | 370 | 410 | 4-28 |

| Model | A, mm | B, mm | C, mm | D, mm | E, mm |
| LS-103 | 30 | 30 | 53 | 30.5 | 24 |

| No. | Part name | Material |
| 1 | Frame | cast iron QT450 |
| 2 | Disk | Stainless steel 316L |
| 3 | Saddle seal | EPDM + wear-resistant material (siliclone+graphite) |
| 4 | Stock | steel 2Cr13 |
Ships within 48 hours · Estimated delivery Jun 20 - Jun 25
US$40
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