How it works
Limit-switch box
The number that matters
Max. medium temperature
176°F / 80 °C
The highest medium temperature this valve is rated for.
Construction
Parts and materials
A limit switch DNOVA APL-410N EX is an electrical device designed to open and close a working circuit and to visualize the positions of the shut–off valve of a pipeline valve. In a sealed box, as a rule, there are two mechanical switches designed for voltages up to 250 V, which monitor the position of the drive rod and signal in extreme positions. They are mounted on top of the surface of the drive. A two-color hemisphere of a visual indicator is located in the upper part of the limit switch block. If the connected pipe fittings are closed, then only the red part of the hemisphere with the inscription CLOSED is visible; if open, only the yellow part with the inscription OPEN. This visual indicator is clearly visible from afar, which simplifies the inspection of equipment, and the color difference between the open and closed positions reduces the likelihood of erroneous perception of information. Thanks to the use of LSU, it becomes possible to transmit information about the position of the pipeline.
Dimensions and installation dimensions of limit switch unit DNOVA APL-410N EX
| A, mm | B, mm | C, mm | D, mm | E, mm | F, mm | G, mm |
| 177 | 174 | 178 | 101 | 76 | 57 | 55 |
| H, mm | I, mm | J, mm | K, mm | Ød1, mm | Ød2, mm |
| 23 | 27 | 3 | 4 | 5 | 9.5 |
Sketch of overall dimensions of limit switch unit DNOVA APL-410N EX
Materials of limit switch unit DNOVA APL-410N EX
| Name | Materials |
| Enclosure cover and housing | aluminum die casting |
| Shaft | stainless steel |
| Indicator cover | polycarbonate |
| cam | polycarbonate |
| Spring | stainless steel |
| Body cover bolts | stainless steel |
| O-ring | NBR |
| bushing | bronze |
| O-ring (shaft) | stainless steel |
| Ground terminal | stainless steel |
| Indicator | ABS plastic / polycarbonate |
| Bracket | stainless steel |
Passports and certificates
- Body material
- Aluminium alloy
- Maximum allowable temperature
- 176 °F / 80 °C
- Voltage
- 250 V
- Country of origin
- China
Production. Usually 7–14 business days after you approve the quotation and pay. Made-to-specification items are confirmed in the quotation.
Freight. Not charged at checkout. A manager quotes air and sea freight to your port or airport, and nothing ships until you approve the price and the freight.
To North America. From approval and payment to the destination port or airport: air 14–24 days, sea 32–60 days. Estimates, not guarantees.
Terms. EXW Ningbo or FOB Ningbo Port; CIF on request. The agreed term is written on the Proforma Invoice.