| 摘要 |
A valve assembly comprises a valve cylinder and a piston valve slidable in the cylinder. The cylinder is formed of a one-piece tubular body and has a cylindrical bore formed therein, the bore being divided into two sections one of which is larger in diameter than the other so as to form an annular step therebetween. A tubular collar is tightly fitted in the bore so as to seat on the step and has a pair of cut-out portions formed at an annular edge thereof. The cut-out portions receive both ends of a guide member permitting the lengthwise movement of the valve and holding the valve against turning in the cylinder.
|
