The NVS6000 High Pressure
Needle Valve incorporates state-of-the-art technology, in a simple
but rugged design which can be advantageously used for most high
pressure and high temperature liquid gas systems. Typical
applications are in Steam / Water / Gas Sampling systems. High
Pressure Test Rigs for testing critical components for the Nuclear /
Space industry and Hydraulic Systems.
Salient features of design and operation:
Forged body with integral
stuffing box eliminates bonnet gasket joint which is the main source
of leakage. The external bonnet serves only for support.
spindle / plug design. Non-rotation of valve spindle is achieved by
a two piece spindle joined by a rugged differential mechanism. this
design guarantees long seat life as grinding between plug and seat
is prevented. Packing life is also extended due to lower friction in
the stuffing box.
The spindle thread does
not come in contact with the medium. The rotating parts can be
adequately lubricated to prevent thread seizure.
Preformed, pure graphite
packing rings and roller burnished spindle face ensure excellent
stuffing box tightness under extreme pressures / temperatures.
Easy on-line disassembly