INDUSTRIES
Industry Applications
Conveyor protection is about stopping reliably, staying aligned, detecting slip and catching a rip; valves are about closing tight, controlling accurately and surviving erosion. The two needs combine differently in each industry.
Power plant coal handling
Long belts, multiple transfer points, dust and wide temperature swings. Trip accuracy directly affects coal feed, and false alarms cause frequent starts and stops.
- Bi-directional pull-cord switches plus two-stage misalignment switches along the line
- Slip and belt-break detection, with 4–20mA output for VFD duty
- Chute blockage: rotary paddle level detector plus material flow detection
- CAN address coding locating the alarm to belt section and switch tag
Port bulk and stacker-reclaimers
Sea wind, salt fog and continuous operation corrode metal parts quickly; travel and luffing mechanisms need dense limit and interlock points.
- 304 stainless steel pull-cord and misalignment switches
- Heavy-duty limit switches for mechanism travel protection
- Emergency stop and interlocking along shiploaders and stacker-reclaimers
- Ex d IIB T4 Gb versions in hazardous zones
Cement and mining
High dust, strong vibration and heavy-load starts; bins and crushers are prone to blockage and overload.
- Extended rotary paddle level detectors (shaft 1000–1800 mm)
- Rip detectors with barrier rope
- Speed detection for stall and blockage interlocking
- Powder-coated die-cast housing for dusty environments
Steel and metallurgy
Radiant heat, steam and mill scale shorten the life of standard seals and packing.
- High-temperature limit and pull-cord switches
- Metal-seated ball valves for hot, solids-bearing media
- Y-pattern globe valves and high-differential control valves
- Hard-seal butterfly valves for cooling water and dust removal lines
Petrochemical and refining
High temperature and pressure, corrosive media and frequent modulation; internal leakage and erosion are the main failure modes.
- Gate, globe and check valves to ASME B16.34
- Erosion-resistant high-differential control valves, seat overlay 8 mm and above
- Multi-stage trims to suppress cavitation
- Instrument valves and manifolds for transmitters
Municipal and water treatment
Large size, low pressure, long continuous runs; reliable operation and easy maintenance come first.
- Triple-offset hard-seal butterfly valves for large-size isolation
- Soft or metal seating selected by water quality
- Electric and pneumatic actuators
- Check valves protecting pump sets against reverse flow
The above are common configurations. Final models depend on belt length, width, speed, material characteristics and piping parameters.