PRODUCTS
Products
Organised by two product lines: conveyor belt safety devices, and industrial valves with instrument valves. Each section lists representative models and key parameters; full parameters are in the catalogues.
1. Conveyor Belt Safety (LYSH series)
Used along belt conveyors for emergency stop, misalignment correction, slip monitoring, material flow detection and rip protection. Protection class IP65, die-cast aluminium enclosures; 304 stainless steel versions for corrosive or salt-fog environments; Ex d IIB T4 Gb versions for hazardous areas.
| Family | Representative models | Key parameters | Typical use |
|---|---|---|---|
| Bi-directional pull-cord switch | LYSHHPLS / LYSHHLS-B / LSSH-LS-C | Operating force >70N, 2 SPDT contacts, AC380V/5A | Emergency stop along the line |
| Two-stage misalignment switch | LYSH-PK-15 / LYSH-PK-20 / LYSHPK-B | Stage 1 at 15°, stage 2 at 30° (or 20°/35°), limit 75° | Belt misalignment alarm and trip |
| Speed and slip detection | JXDH-0706-Z / LYSH-DHJC / LYSH-DHSJ | 5–4500 RPM, accuracy better than 99%, 4–20mA optional | Slip, overspeed and belt-break protection |
| Material flow and level | LYSH-YHLW-1 / LYSHLW-JC | Paddle 5 rpm, operating torque 0.05–0.1N·m | Blockage, no-load and bin level control |
| Rip and limit | LYSH-YHZL / LYSH-XW-GL | Rip operating force ≥20N; limit ±20°, ultimate 120° | Longitudinal rip, mechanism limit |
| CAN address-coding system | LYSH80 / LYSH100 / LYSH-ZJ / LYSH-BM-A | 254 address nodes, 1.2 km per span, up to 20 spans networked | Multi-point alarm location and upload |
The table is an extract of common specifications. Model suffixes, contact ratings, cable entries and mounting accessories follow the catalogue and order drawing.
2. Industrial Valves (SWEK series)
Gate, globe, check, ball, butterfly and control valves plus instrument valves, to ANSI/ASME/API standards. Size DN10–DN2000, pressure class 150–4500Lb, temperature -196~700°C, body materials including WCB, WC6, WC9, CF8, CF8M, A105, F22, F91, 321, 316SS and 347H.
| Family | Design / features | Size and pressure | Service |
|---|---|---|---|
| Gate / globe / check | Wedge and parallel gate, globe, swing check; bonnet types A–D | 2″–24″, ANSI 600–2500; Y-globe 1/2″–4″ | High-temperature shut-off and non-return |
| Ball valve | Metal-seated, floating and trunnion mounted, fire-safe, anti-static, blow-out proof stem | 3/8″–36″, 150–4500Lb, -40~570°C | Solids-bearing and high-temperature lines |
| Butterfly valve | Triple-offset, bi-directional hard seal, low-emission packing 0–20 PPM, ISO5211 mounting | 1-1/4″–80″, 150–600Lb, -40~610°C | Large-size isolation and control |
| Control valve | Standard globe or angle body, post-guided, balanced, low-flow, multi-hole and anti-cavitation trims | 1/2″–12″, 125–900Lb | Flow and pressure regulation |
| High-differential control valve | Anti-abrasion design, seat overlay 8 mm and above, serviceable in line | 3/8″–4″, 4500Lb, 610°C | High differential, cavitation-prone duty |
| Instrument valves and fittings | Y-pattern process valves, manifolds, tube fittings, needle valves | 1/4″–1-1/4″, 150–4500Lb, -50~610°C | Instrument piping and sampling |
Laiyuan is an authorised distributor of SWEK industrial valves. Parameters on this page are taken from the brand’s official catalogues; authorisation certificates, certificates of origin and material certificates are available on request.