Flow Control Valve
for a full Brochure and Data Manual
In 1989 we purchased the sole
manufacturing and intellectual rights for the Blakeborough 'Larner-Johnson'
Flow Control Valve from the Hopkinsons Group.
The valve was originally developed
for use on hydroelectric power plants in the U.S.A. where it pioneered
the application of the needle valve principal to the problems of flow
control in pipelines and conduits.
Its principal application is
the control of fluids, notably the water supply field, where the pressures
and control requirements bring its advantages into full play. There is
also a regular demand from power stations and the petroleum industry.
City of New York Water Project
We are furnishing four 60" x 48" Larner-Johnson Inline Needle Control Valves for the Catskill Ashokan Reservoir - Lower Gate House. These Valves will pass 450 million gallons per day at full flow at 97 feet TDH. Two of these valves have been installed and are fully operational, while the other two are in the installation process. The Larner-Johnson Valves are manufactured by Blackhall Engineering Ltd., which owns the world wide rights to the Larner-Johnson Valve.