SEIKI SEISAKUSHO Co., Ltd. (株式会社三栄精機製作所), a Japanese manufacturer specializing in pneumatic machinery using compressed air as a power source. The company has over 100 years of experience in air-powered equipment, emphasizing durability, performance, operability, and suitability for harsh environments (e.g., explosive gases, dust, high temperatures, humidity). Their air hoists are vane-type pneumatic chain hoists, known for explosion-proof safety (no sparks), 100% duty cycle (continuous operation), variable speed control via pendant or string, compact/lightweight design, reliable mechanical/pneumatic braking, and optional oilless (oil-free) versions.
Air hoists are ideal for industries requiring safe lifting in hazardous areas, such as chemical plants, mining, painting booths, foundries, and general heavy manufacturing. They support custom configurations (e.g., all-air cranes, special lifts) and can operate on nitrogen (N2) or other gases upon consultation.
Product Categories (Main Series for Air Hoists)
The air hoist lineup is divided into four primary series: VLX, VMX, VHX, and GLX. All use rotary vane air motors, load chains (manganese alloy steel), and robust materials (aluminum/iron castings, chrome-molybdenum steel gears, etc.). Key differences lie in operation method (pendant vs. pull-cord/string), lift height limits, and optional features like chain buckets.
- VLX Series
- Operation: Pendant control only (pendant-style with push-button speed control).
- Key Features: Standard series for general use; compact, lightweight, precise variable speed (via pendant pressure), reliable braking.
- Max Lift Height: VLX25 and VLX50: up to 20 m; VLX100: up to 10 m.
- Typical Capacities: 0.25 t (250 kg), 0.5 t (500 kg), 1 t (1000 kg).
- Specific Models/Variants:
- VLX25 (e.g., VLX25LP-PR, VLX25LP-MR, VLX25LP-GR)
- VLX50 (e.g., VLX50LP-PR, VLX50LP series)
- VLX100 (e.g., VLX100LP-MR)
- VMX Series
- Operation: Both pull-cord (string) and pendant control available.
- Key Features: Similar to VLX but with flexible control options; suitable for applications needing quick manual string operation or remote pendant.
- Max Lift Height: VMX100: up to 20 m; VMX200: up to 10 m.
- Typical Capacities: 1 t (1000 kg), 2 t (2000 kg).
- Specific Models:
- VMX100
- VMX200
- VHX Series
- Operation: Both pull-cord (string) and pendant control.
- Key Features: Includes standard steel chain bucket (iron bucket or high-durability synthetic canvas "Tredak" for chain storage); designed for cleaner operation and chain protection.
- Typical Capacities: Similar to VMX/VLX range (0.5–2 t or custom).
- Specific Models: VHX series (variants not always numbered separately; often tied to capacity like VHX100, etc.).
- GLX Series
- Operation: Pendant control only.
- Key Features: Geared or trolley-compatible (various trolleys as options: plain, geared, motorized); suited for monorail or overhead crane integration.
- Specific Models:
- GLX20LP (example shown in docs, ~0.2–0.5 t range)
- Other GLX variants for higher capacities or custom setups.
Additional Notes on Models and Options
- Capacities Overall: Commonly 0.25 t to 2 t (250 kg–2000 kg), with examples up to 2.9 t in custom/introduced cases (e.g., 0.5 t and 2.9 t for all-air cranes).
- Control Types: Pendant (push-button for variable speed), pull-string (cord for direct manual), or combined.
- Trolley Options (often for GLX or add-ons): Plain trolley, geared trolley, motorized trolley; hook-on or rigid connection.
- Special/Custom: Oilless hoists, explosion-proof enhancements, chemical plant specials, all-air crane systems.
- Accessories: Air filters, regulators, lubricators, hoses, bumpers, etc., recommended for installation.
