Explosionproof key switch KVV
Explosionproof position switch made from aluminum VPV-1A
Explosionproof position switches VPV-4B and VPV-4M
Explosionproof limit switches made from aluminum VK
Explosionproof microswitches MPV-2
Explosion-proof switches are devices intended for remote control of the electric drives operation.
Scope of application is explosion hazardous areas:
- on stationary units of chemical, oil and gas and other industries enterprises, including for controlling the pipeline valves (VK);
- on transport, including underground and air transport.
Design
- The key switch KVV consists of a body, a cover, a key with spring cams and a contact block with two spring-loaded cross members.
- Explosion-proof enclosure (made of aluminum alloy) of the position switch VPV-1A consists of a body and a cover. A contact block is installed inside the body. An actuating unit is made as a pusher or with a lever fixed on the holder.
- Explosion-proof enclosure (made of aluminum alloy) of the position switch VPV-4B(4M) consists of a body and a cover. Two contact blocks with an actuating unit consisting of a shaft-mounted swiveling lever with a roller, a rope, a pedal or a slot are installed inside the body. Two cams, which impact driving elements of contact blocks using braces with rollers, are located on the shaft.
- The VKV-2 type switch consists of a body, a gear, a microswitches block, a cover, input devices, internal and external grounding devices, a position indicator with “Open” (O) and “Closed” (C) positions. Design of the switch VKV-1 is different from VKV-2, as instead of one of the covers, a terminal box consisting of a body, a cover, terminal blocks and two input devices is installed.
Advantages
- High ingress protection level (IP65, IP66).
- The position switches may have different drive types.
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