WPZ Single Speed Cast Iron Worm Gearbox — WP Series

Flange-mounted drives — where the gearbox attaches via a circular flange plate rather than a flat foot-mount base — are essential when the mounting surface is a pipe flange, vessel nozzle, column plate, or wall bracket. Standard foot-mount gearboxes require custom fabrication to adapt to these surfaces, creating precision alignment challenges and added engineering cost. The WPZ Single Speed Cast Iron Worm Gearbox is purpose-built with a Z-type flange housing and top-entry (T-type) input shaft, designed for direct flange-to-flange mounting on standard industrial vessels, column drives, and wall-mounted applications. Its compact size range (50–135 mm centre distance) targets the precision small-to-medium drive market where mounting surface compatibility is the primary design constraint.

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■ Z-Type Flange Housing — Direct Vessel Flange Compatibility

The WPZ housing is machined with a circular bolt-pattern flange face, compatible with standard pipe and vessel flanges. This eliminates custom adaptor fabrication and provides a rigid, precisely aligned mounting interface.

■ T-Type Input Shaft — Upward Entry for Compact Profile

The T-type input shaft enters from directly above the gearbox, providing the most compact possible overall height for ceiling or vessel-top drive installations.

■ Compact Size Range: 50–135 Centre Distance

The WPZ size range (50–135 mm) targets the small-to-medium drive market where flange mounting is most commonly required, covering output torques from 17 to 562 Nm.

■ Standard Ratio Range 1/5–1/60

Full ratio range maintained across the WPZ size range, matching the full selection flexibility of the foot-mount WP series.

■ FC20+ Cast Iron — Consistent Material Standard

The Z-type housing maintains the FC20+ grey cast iron material specification, providing identical mechanical properties and vibration damping to all other WP-series variants.

■ Oil Level Gauge & Drain Plug Positioned for Z-Mount Orientation

The WPZ oil gauge and drain plug are positioned for the Z-type mounting orientation (flange horizontal, shaft vertical), ensuring oil level management is practical in the installed position.

⚒ Vessel & Reactor Nozzle Drives

Chemical vessels, reactors, and tanks with agitator nozzle flanges use the WPZ as a direct bolt-on gearbox, mating the Z-type housing flange directly to the vessel nozzle without custom adaptor fabrication.

⚊ Column & Tower Drives

Industrial column mixers and tower-mounted equipment use WPZ’s flange mount to attach directly to column structural flanges, providing a cleaner, more rigid drive attachment than improvised foot-mount solutions on curved surfaces.

⚔ Ceiling & Wall-Mount Applications

Ceiling-mounted and wall-mounted drives in production facilities use WPZ flange-mount capability to attach securely to structural steelwork without floor-mount brackets.

☵ Compact Process Drives — Pilot Plant

Pilot plant and laboratory-scale process equipment with standard flange connections use the WPZ to match the vessel and pipe flange standards already established in the plant design.

⚛ Hanging Equipment — Overhead Crane Accessories

Overhead crane accessories and hanging industrial equipment use the WPZ flange to mount the drive on a structural member without requiring a separate mounting bracket fabrication.

✎ ISO 9001:2000 Certified

We hold ISO 9001:2000 International Quality System Certification — the first in our industry category to achieve this standard. Every WPZ is manufactured, assembled, and tested under this quality framework.

✎ CE Marking

Full CE marking confirms compliance with EU Machinery Directive 2006/42/EC requirements — covering safety, design standards, and manufacturing quality for mechanical power transmission equipment.

✎ Pre-Shipment Testing

Every unit undergoes: Noise test (below 68 dB(A) at rated load), Oil leak test (30-minute pressurisation), and Torque transmission test (output torque within ±5% of rated). Failed units are reworked — not shipped.

✎ FC20+ Material Certification

Housing castings are verified by material test certificates for FC20 grade (220 MPa minimum tensile strength). Hardness testing (160–200 HB) and ultrasonic testing for internal defects are performed on size 135 and above.

“WPZ gearboxes on our reactor nozzle drives. The flange mount goes straight onto our standard 150mm vessel nozzle flange — no custom bracket, no alignment headaches. After 5 years and multiple chemical environments, the cast iron housing shows no corrosion issues with our standard epoxy coating.”

“We use WPZ across our pilot plant mixing skids. The Z-flange matches our standard process vessel nozzle pattern perfectly — we’ve standardised the vessel nozzle design to accommodate WPZ gearboxes directly. Eliminates an entire custom fabrication step from every project.”

“WPZ-80 on our reactor agitator flanges. Compact size is important in our tight equipment layouts, and the flange mount provides the secure, vibration-free mounting we need for pharmaceutical mixing precision. Zero contamination incidents from gearbox oil in 2 years.”

“WPZ on our column-mounted agitator stations. The flange mount to the structural column is very clean — no bracket fabrication, exactly what our project team wanted. Only suggestion: a wider flange bolt circle would be helpful for very large column flanges.”