The M-100 is a compact split-type portable valve grinding machine, weighing 27 kg and powered by an 850 W motor. It is designed for on-site maintenance of conical and flat valve sealing surfaces, including safety valve seats and gate valve discs.

To check whether the M-100 is suitable for a particular valve, start with three checks.

1. The actual sealing-surface diameter — and whether it is conical or flat

The M-100 covers two different ranges, depending on the sealing-surface type:

• Conical valve seats: Φ20–65 mm

• Flat sealing surfaces: Φ20–175 mm

The minimum standard grinding diameter is Φ20 mm. If the actual sealing surface is smaller, confirm the available tooling before selecting the machine.

The nominal valve size is DN20–150 (1″–6″), depending on the valve type and sealing-surface dimensions. However, nominal valve size is only a reference. Selection should be based on the actual sealing-surface diameter.

2. The conical-seat angle

For conical-seat grinding, standard tooling covers three seat angles: 60°, 75° and 90°.

If your conical seat has one of these angles, the corresponding standard tooling applies. If it has a different angle, confirm tooling availability before ordering. Do not assume that a non-standard angle is covered.

3. The working depth and installation space

The M-100 has a maximum grinding depth of 250 mm.

Check the required grinding depth, as well as the valve-body access and clamping dimensions. The machine must be able to reach the sealing surface and be properly installed in the available space.

For on-site maintenance, also consider the machine's 27 kg weight and the space available for carrying and positioning it.

When should you consider another model?

If the required sealing-surface diameter or grinding depth exceeds the M-100's confirmed range, another model may be more suitable, depending on the valve type and installation conditions.

For larger gate-valve or flat-sealing-surface applications, the M-300C may be an option. It covers Φ118–430 mm, with a maximum grinding depth of 850 mm. It is designed for gate valve seats and discs, as well as flat valve seats and discs.

If the actual sealing-surface diameter is below Φ20 mm, do not assume that a larger model will solve the problem. Confirm the available tooling or another suitable configuration first.

Measure the sealing surface, not just the nominal valve size.

Send us the sealing-surface type, actual diameter, conical-seat angle (if applicable), and required grinding depth. We can help check whether the M-100 is suitable for your application.