Top-quality CW617N brass used in manufacturing JERROY ball valves and the high mass and volume characteristics of these products are responsible for their strength, temperature and pressure resistance, and resistance to mechanical stresses that may occur when the valves are installed and operated under sharp pressure drops or workflow overpressure. The successful design minimizes the probability of breakdown of the valves and the appearance of cracks and fractures on the casing throughout the long service life under a variety of conditions and pressure and temperature ranges in the operating medium.
The outer valve casing is nickel plated, and the ball lock is chrome plated. Sealing elements made of wear-resistant 4/PTFE fluoropolymer and nitrile butadiene rubber (NBR) make JERROY ball valves leak-tight.
The valves have structural reinforcement at the threaded coupling of the casing’s components, which according to statistics is one of the weak points of ball valves. The design of JERROY valves protects the casing from breakage both during installation and operation.
The valves are designed with the pin on the inside of the casing rather than on the outside. Thus, even at substantial overpressure and with the adjusting nut completely loose, the pin cannot escape.
During operation, the packing gland can be tightened with the adjusting nut.
The use of 4/PTFE fluoropolymer seals with special graphite additives is a key design feature of the gas valves. This guarantees that JERROY valves are resistant to the probable effect of dispersed volatile oils present in gaseous media. In addition to gas supply systems, JERROY gas valves may also be used in water supply systems.
JERROY valves may be used in systems with wide temperature limits from –20 to 110 C and an operating pressure up to 2.5 MPa; at the same time, JERROY ball valves have a service life of at least 20 000 “open-close” cycles or 50 years of continuous operation.
JERROY ball valve handles are wedge-shaped due to expansion of the top part of their side faces. This handle design considerably reduces the effort required to open and close the valve during operation. The uniqueness of the T-shaped handle (or “butterfly”) of JERROY valves is protected by patents.
A flat steel lever with a low-conductivity PVC coating 1-1.3 mm thick in the functional area is another option for valve handles. The distance from the plane of the lever to the valve axis has been increased compared to most other valves. This protects the handle from temperature effects and possible mechanical damage during operation.