Webtec’s New Hydraulic Combination Valve
By Mike Osenga26 September 2018
Webtec, the specialist manufacturer of hydraulic measurement and control products, is unveiling its new CV120 series combination valve that is designed to provide as a solution to hydraulic motor control for mobile machinery.
Hydraulic system designers will discover that the compact CV120 reduces both space and pressure drop in machinery used for mining, quarrying, construction and agricultural applications, without compromising performance, said Webtec. In addition, costs can be reduced due to the lower number of hoses and fittings required.
This hydraulic valve has a variable priority flow divider combined with a directional control valve in one body. Among the features of the CV120 is a marked single-turn hand dial that permits fast visual adjustments to the pre-determined priority flow. In addition, the new hydraulic valve is pressure compensated, permitting both priority and by-pass to be used simultaneously at varying pressures without affecting the priority flow rate.
CV120 flow control valves utilize the design and components from Webtec’s established VFD120 series. This results in good flow-to-pressure characteristics, which in turn achieve consistent flow independent of load pressure, the manufacturer said. The directional control element uses a hardened alloy steel spool that can be supplied in double-acting or motor types, with three-position spring-centered or detent control. Also featured is a full flow pilot operated relief valve which protects the A and B regulated ports.
The Webtec CV120 has two pump inlets and two tank outlets that allow the plumbing to be connected from either the side or top of the valve, thus simplifying installation. Multiple valves can be used in series by using a high-pressure carry-over (HPCO) coupling and standard fittings. If a HPCO coupling is installed for the use of downstream valves, a second pressure relief valve is required to control the pressure exiting the HPCO. In such instances, the two relief valves work independently of each other.
The CV120 valves offer a maximum operating pressure of 3600 psi (250 bar) and a total flow capacity of 32 gpm (120 l/min), while regulated flow capacity is 0 to 25 gpm (0-95 l/min). Porting choice is either ¾ in. BSPP or 1-1/16 in. -12UN #12 SAE ORB thread sizes, although other thread sizes can be made available for special orders.