초록 ▼

A straight compression valve is disclosed in which shutoff of flow of fluid is effected between surfaces of plastic material, but in which a washer of non-metallic material may be employed under certain conditions. When the washer is not used, the design of the sealing surfaces is such as to obtain

A straight compression valve is disclosed in which shutoff of flow of fluid is effected between surfaces of plastic material, but in which a washer of non-metallic material may be employed under certain conditions. When the washer is not used, the design of the sealing surfaces is such as to obtain a highly effective shutoff with a minimum of closing pressure, while avoiding breakage of parts of the valve adjacent the sealing surfaces. Means are provided for controlling the movement of the valve stem to prevent breakage of the valve bonnet and other parts during closing of the valve. The valve body is provided with flats or flat surfaces which are so disposed or positioned in relation to the valve as a whole as to enable the valve to be clamped in a vise for facilitating access to the stem and other parts of the valve. The use of packing glands is avoided through the use of an O-ring and its structural location in the valve.

대표청구항 ▼

In a valve of the character described, a valve body, a valve stem mounted in said body for reciprocal movement thereIn, said stem being of cylindrical configuration and terminating at its lower end in a flat surface perpendicular to the axis of said stem, an internally threaded metallic element fric

In a valve of the character described, a valve body, a valve stem mounted in said body for reciprocal movement thereIn, said stem being of cylindrical configuration and terminating at its lower end in a flat surface perpendicular to the axis of said stem, an internally threaded metallic element frictionally secured within the lower central portion of said stem, a washer of non-metallic material disposed in contact with said flat surface, and a screw for securing said washer to said flat surface, said screw being threadedly secured to said element.