Calpeda 16006140000 Mechanical Seal - Type 3 R X7X72Z7, 12 mm Shaft
The Calpeda 16006140000 is the genuine mechanical shaft seal for a 12 mm pump shaft, supplied in the Type 3 R configuration and the X7X72Z7 material specification. It seals the shaft where it leaves the wet end, using a spring-loaded pair of lapped faces that run on a microscopically thin film of the pumped liquid rather than touching directly.
The detail that matters most on this particular part is the material code. Calpeda offers more than one seal for a 12 mm shaft in the same Type 3 R form, and the alternative carries the X6H62V6 code that the company lists as its standard specification. This one is built to X7X72Z7 instead. The two will physically go into the same place and look broadly alike, but the code is what identifies the face and elastomer materials, and those determine what liquids and temperatures the seal will tolerate. Fitting a standard seal where a pump was specified with this one, or the reverse, can mean a seal that chemically degrades or hardens in service long before its faces are worn.
So the ordering rule is simple: match the code as well as the shaft diameter, and take it from the parts list or the seal you removed rather than from the shaft size alone. Handling is the same as any mechanical seal. Keep the lapped faces clean and untouched, handle the halves by their edges, wet the elastomer with clean or soapy water and keep oil and grease away from it entirely. Once it is in, priming discipline does more for its life than anything else, because a face pair run without liquid between it is damaged in seconds rather than hours.
Key Features
- Genuine Calpeda spare part
- 12 mm shaft size, Type 3 R configuration
- X7X72Z7 material specification - distinct from the standard X6H62V6 seal of the same size
- Spring loaded to hold face contact as the faces bed in and wear
- Complete two-part seal supplied ready to fit
- Coded so the correct material build can be identified without guesswork
Applications
- Calpeda pumps on a 12 mm shaft specified with the X7X72Z7 seal build
- Like-for-like replacement where the removed seal carries this code
- Duties where the standard seal specification is not the one the pump was supplied with
- Wet-end overhaul, rebuild kits and workshop spares stock
- Marine, dockside, industrial and agricultural pump service
Specifications
- Brand: Calpeda
- Manufacturer: Calpeda Spa
- Manufacturer Part Number: 16006140000
- Part Type: Mechanical shaft seal
- Shaft Diameter: 12 mm
- Seal Type: Type 3 R
- Material Specification: X7X72Z7
- Quantity Used: One per pump
- Condition: New
Frequently Asked Questions
Q: Where do I find the code on the seal I removed?
It is normally marked on the stationary seat or on the packaging the original came in, and it also appears against the seal item in the pump parts list. If both are gone, the pump serial number is the way back to it - send it over and we will look it up.
Q: What happens if I fit the wrong material specification?
It will usually run and look fine at first. The trouble comes later, as the elastomer swells, hardens or loses its grip on the shaft, or the faces wear abnormally against a liquid they were never chosen for. Premature failure rather than immediate failure is the typical outcome.
Q: Does the same code cover every shaft size?
No. The code describes the materials and the shaft diameter is a separate dimension, so both have to be right. A seal in the correct materials but the wrong bore will not grip the shaft properly and will not seal.
Q: Should I change the casing O-ring at the same time?
It is good practice. Reaching the seal means opening the wet end, which is exactly the point at which the casing seal should be renewed rather than reused. Doing both at once saves ever having to take the pump apart twice.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct seal size and material code before you order.
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