Engineering & Manufacturing
A rotary valve is a small component with a large influence on a system: clearances that are too open leak air, geometry that is slightly off does not fit, and a rotor that is out of balance destroys its own bearings. This page describes how we control those three things.
A rotary valve is a small component with a large influence on a system: clearances that are too open leak air, geometry that is slightly off does not fit, and a rotor that is out of balance destroys its own bearings. This page describes how we control those three things.
Housing bores, flange faces and rotor bodies are machined on CNC turning and milling centres. Bores are machined after welding so that distortion is cut out rather than shimmed around, and flange faces are cut square to the bore axis in the same set-up wherever the geometry allows.
Vane profiles and pocket volumes are produced to the approved drawing, then checked for tip clearance against the housing they will actually run in — not against a nominal figure. Rotors are balanced before assembly on units that run above moderate speed.
Shaft, bearings, seals and drive are assembled and aligned in-house. Every unit is turned by hand before power-up to confirm there is no interference, then run under power to check rotation direction, noise and bearing temperature.
Critical dimensions, shaft runout, tip clearance and flange squareness are measured and recorded per unit. A dimensional record travels with the shipment, so the OEM's incoming inspection has something to check against.
Material grades are purchased against the order specification, with mill certificates available on request. Bearings, seals and drive units are sourced from named suppliers so that a repeat order does not quietly change component quality.
Units are run-in and checked for rotation, noise and seal tightness at the bench. Where the duty requires it, a leakage check is carried out at the specified differential pressure and the result recorded on the inspection sheet.
Flange faces are protected, rotors are immobilised, and units are packed for sea freight with desiccant where the destination demands it. Marking and packing lists follow the customer's incoming goods requirements.
Every production run references a frozen drawing revision. Changes are recorded, agreed in writing and applied from a stated date, so a repeat order cannot silently pick up a modification that the customer has not approved.
We publish technical illustrations rather than stock photography. Photographs of our own workshop, machines and finished valves are being prepared and will replace these panels; we will not use images of other companies' factories to represent our own.
Send the drawing with the critical dimensions marked. We will tell you which ones we can hold, which need a process change, and what the inspection record will contain.