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How to read a vane pump model code
A practical guide to reading model codes on V, VQ, T6, T7, SQP, V10, V20 and VTM42 frames so you order the right cartridge kit the first time.
A vane pump model code is not decoration. It encodes the frame, the displacement, the shaft, the port arrangement and the direction of rotation, and every one of those has to match before a cartridge kit will fit. Reading it correctly is the difference between a one-day repair and a three-week detour.
Take a V series code such as 35V30A-1C22R. The leading number is the ring size, the V identifies the series, the next number is the nominal displacement, the letter that follows describes the shaft, and the trailing R is the rotation viewed from the shaft end. Get the rotation wrong and the pump will build no pressure at all, even though every part physically assembles.
The double pumps follow the same logic twice over: 4535V identifies a 45 ring at the front and a 35 ring at the rear, which is why a double pump needs two cartridge kits rather than one. T6 and T7 codes describe the same information in a different order, and SQP codes put the displacement of each section after the frame number.
If the nameplate is worn, photograph the pump from the port face and the mounting flange and, if it is already apart, photograph the cam ring. Those three views identify most frames without any code at all.
Specifications
| Series covered | V, VQ, T6, T7, SQP, V10, V20, VTM42 |
|---|---|
| What the code fixes | Frame, displacement, shaft, ports, rotation |
| If the plate is unreadable | Photograph port face, mounting flange and cam ring |
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Send us the model code and we will quote
Tell us the code stamped on the pump, or send a photograph of the nameplate. You will get the frame, the price and the shipping date in writing.