The ZTMR6-L6-D valve is made up of two 2-position,3-way directional valve and a pressure regulating valve in parallel connection.It is the important master valve for air valves in repairing oil-well machine,and it is equal to 5-position,6-way directional control valve.And the pressure of C mouth can be controled by handle and the handle can fix location.

The ZTMR6-L6-F valve is made up of two 2-position,3-way directional valve and a decompression valve in series connection.And it is also a important valve for the valves in repairing oil-well machine,,is equal to 5-position,6-way directional control valve.The pressure of A and B can be controled by handle,the handle can come back to meso-position automatically.