초록 ▼

A valve system with an electromagnetically operated pilot valve for pneumatically actuating an operating piston of a primary valve for accurately metering, controlling and/or dispensing fluid with the primary valve. The piston is connected for pivoting a valve member actuating rod enclosed within a

A valve system with an electromagnetically operated pilot valve for pneumatically actuating an operating piston of a primary valve for accurately metering, controlling and/or dispensing fluid with the primary valve. The piston is connected for pivoting a valve member actuating rod enclosed within a flexible tubular projection of a Teflon valve body via a rocker arm engageable with a free end of the tubular projection. Connectors for inlet and outlet Teflon conduits to the Teflon valve body have hard plastic inserts mounted within inlet and outlet passageways of the valve body between conforming sealing surfaces of the valve body and conduits.

대표청구항 ▼

In a valve comprising a valve body with passageway means therein including fluid passageway means with a valve operating chamber, a valve member shiftable within the valve operating chamber for controlling the flow through the fluid passageway means, and valve operating means for shifting the valve

In a valve comprising a valve body with passageway means therein including fluid passageway means with a valve operating chamber, a valve member shiftable within the valve operating chamber for controlling the flow through the fluid passageway means, and valve operating means for shifting the valve member for controlling the fluid flow through the fluid passageway means, the improvement wherein the valve operating means comprises a valve member operating lever pivotally mounted within said valve body passageway means and having a lever arm at one end of the operating lever for pivoting the operating lever for shifting the valve member, wherein the valve body is a one-piece plastic valve body with an integrally formed imperforate enclosed tubular projection receiving the lever arm and forming therewith a lever combination, the tubular projection completely enclosing the lever arm within said plastic valve body passageway means and being flexible to permit pivoting the lever combination and thereby pivot the lever arm enclosed therein for shifting said valve member, and wherein the valve operating means further comprises means for pivoting the lever combination for shifting the valve member.