FILTON Rotary (M.C.T.) Unions M.C.T.

Presentation of Rotary (M.C.T.) Union

The Rotary (M.C.T.) Union is mainly intended for use on machine tools for the transfer of fluids (such as oil and air) to and from rotating shafts for air and hydraulic chucks, brakes, clutches, etc.
The type of Rotary Seal fitted to the Rotary (M.C.T.) Union is a “FILTON BALANCED MECHANICAL SEAL”, containing multiple helical coil springs. The seal face materials are normally carbon against stainless steel. For applications on machine tool coolants where traces of abrasive particles may be present we recommend tungsten carbide seals. If required add code T.C. to the part number.
Rotary sealing is created by relative rotation between extremely flat sealing faces (items and 4) held in contact by the helical coil springs and an additional sealing force created by the pressure of the fluid passing through the Rotary (M.C.T.) Union.

The Rotary (M.C.T.) Union is fitted with a matched pair of pre-loaded angular contact ball bearings lubricated for life with a special grease. A double range of Rotary (M.C.T.) Unions is offered with the machine end connection having parallel pipe threads (R.H. or L.H.) for speeds up to 1,500 r.p.m. and with an additional concentric locating spigot for speeds up to 3,000 r.p.m.
There are 3 variations of the stationary Adaptor end described below :

Type M.C.T./B.E. • Type M.C.T./S.T. • Type M.C.T./R.S.

Example : Rotary (M.C.T.) Unions type B.E. with locating spigot :

The components with an asterisk rotate with the machine shaft

Adaptor, aluminium alloy.

Mechanical seal sub-assembly.

Gaskets, c.a.f. jointing.

Seal ring sub-assembly.

Spacer, plated steel.

Locking ring, steel.

Angular contact ball bearings.

Body aluminium alloy.

Rotary spindle, plated steel.

‘O’ Ring, synthetic rubber.


Operational Guidelines

Fluids : Mineral oils, machine tool coolants and compressed air (lubricated). All Nominal fluids should be clean and free from abrasive particles. Special tungsten Size carbide seals are available for abrasive conditions (if required add “TC” as a suffix to the part number).

Pressure : 70 bars maximum.

Vacuum : 740 mm Hg maximum
(specify “vaccum” and we will test for this).

Temperature : -20°C to 75°C.

Speed : 1500 r.p.m. maximum without locating spigot, 3500 r.p.m.with locating spigot.

Flow capacity
Type Liquids*
8 (¼”) BE 0.3 11
ST & RS 0.05 2
10 (3/8″) BE 0.8 29
ST & RS 0.1 4
15 (½”) BE 1.7 58
ST & RS 0.3 10
20 (¾”) BE 2.7 96
ST & RS 0.6 22
25 (1″) BE 4.1 144
ST & RS 1.8 44
*Flow at a velocity of 3 m/s
** Flow at a velocity of 15 m/s and a pressure of 6 bar

It is not advisable to combine maximums