These valves are externally pilot-operated, making one basic valve perform many different functions. Multiple pilot arrangements, easily modified, allow you to choose or change valve capability as required.
Unique design features and unit-built construction assures positive sealing, linear valve action, uniform fast response and leak-proof performance. In addition, the basic valves body and internals are the same throughout the line, simplifying spare parts inventory and reducing costs. These valves can be installed in a horizontal or a vertical line with flow direction vertical up.
Model 710 / 711 on - off solenoid operated valves
Model 710 valves are typically used to stop flow on applications such as high level shut-off into storage, on-off line block control, jet fuel filter-separator control from a water detector, blend line selection and many other applications requiring remote on-off control. Model 710 closes upon loss of electrical power while Model 711 opens upon loss of electrical power.
Model 720 / 721 remote on - off valves
These control valves are designed for remote on-off control of product flow. Valves may be supplied for either normally open (Model 721) or normally closed (Model 720) service. The pilot may be operated either hydraulically or pneumatically with a minimum pressure of 15 psi (103 kPa). The valve utilizes balanced, single seated pilots with large ports.
Model 750 pressure reducing valves
Designed to regulate downstream pressure within ±2 psi (13.8 kPa) or better, regardless of variations in flow rate or upstream pressure. The pilots are balanced, single seated valves with large ports and are not affected by variations in upstream pressure.
Model 754 rate of flow valves
These flow-limiting valves maintain a controlled flow rate within ±2%. The pilot is a balanced, single sealed valve with large ports and will operate on a differential as low as 5 psi (34.5 kPa).
Model 760 back pressure / 761 pressure relief valves
Both models are designed to regulate valve inlet pressure within ±2 psi (13.8 kPa), regardless of variations in flow rate or downstream pressure. The pilots are balanced, single seated valves with large ports and are not affected by variations in downstream pressure.
Model 770 differential valves
Model 770 (normally closed) differential control valve is designed to maintain a controlled pressure differential within ±2%, regardless of variations in upstream or downstream pressure. The pilots are balanced, single seated with large ports and operate on a differential as low as 5 psi (34.5 kPa).
Gas loaded relief / back pressure valves
Models 762, 763, 765, 766 and 767 gas loaded relief / back pressure control valves are specifically designed to regulate and control maximum pipeline pressures or to maintain a minimum back pressure in a system. They have proven to be reliable, rugged and very responsive in controlling pipeline surges and pressures.
These valves are not pilot operated. They incorporate an integral oil reservoir mounted on the external surface of the valve cylinder head, which upon installation, is partially filled with a light oil. A major benefit of the valve design is that all internal parts, including cylinder, piston and seat ring are removed as a cartridge assembly which keeps your line connections intact.
Model 788 digital valve
Designed to provide precise flow rate control and batch delivery of fluid products when used with an electronic batch control device (preset). Model 788 digital control valve is automatically controlled by the preset for low flow start-up, high flow rate control, low flow shutdown, and final shut-off. This valve also provides for maximum flow meter accuracy by maintaining a constant flow rate with varying line pressures.