What are the models of sleeve compensator?

The sleeve compensator with large compensation volume and low frictional resistance is commonly used in thermal pipelines and can be classified according to its function and compression method as follows.
Displacement compensation form can be divided into: one-way, two-way.
Packing compression can be divided into: ordinary type, injection filling type.
Constraint form can be divided into: unconstrained type, pressure balance type.
The unidirectional sleeve compensator sealing structure adopts packing gland type, which is provided with preload by bolts and sealed with sealing filler. In the structure is more suitable for hot water pipeline and the pressure is not high. In the occasion of higher pressure and higher temperature, it is easy to appear due to insufficient preload and lead to sleeve compensator leakage.
Two-way sleeve compensator in one direction on the basis of the outer sleeve tube in both directions have expansion core tube, compensation volume for the ordinary twice, to achieve two-way compensation, the use of two ordinary type to reduce the length of the size and reduce the cost. Can be divided into ordinary compound and injection-filled compound two kinds.
Injection-filled sleeve compensator consists of core tube, outer jacket tube, stuffing box, sealing filler, filling tube, etc. The stuffing box is filled with formed packing and non-formed flexible packing, so that the compensator can slide relatively axially. Seal packing plays a sealing role when sealed for the purpose of maintenance work.
Pressure-balanced sleeve compensator through the internal device to balance the pressure thrust, also called "no thrust" and do not balance the friction, in the calculation of fixed bracket thrust, divided into straight-through pressure type and bypass pressure type.