TFE-based packings seal more tightly, have vastly less friction, are easier to adjust properly, are chemically inert.

Automatic Recirculation valves in service for minimum flow protection on centrifugal pumps. Service is water condensate at ~330 F.

Flange end-Raised Face per ASME B16.5, standard 3.2/6.3 Ra flange facing finish per ASME B46.1, ASME16.34, API594.

I am designing a hydraulically activated 4/2 spool vlave that will work at relatively low pressures (10 bar max).

Our reflux apparatus consists of a centrifugal pump and a flow control valve. The pump generates 60psia upstream of the valve.

With a bypass its normally the same size or smaller than the control valve? But can the ball valve be directly attached to the tee.

A General Twin Seal valve, or a similar single body double block and bleed valve, often uses a device to relieve the pressure in the cavity between the 2 seals to the upstream (or downstream) side of

I sometimes find that the client need "Approved" valve. Although colleague explain that it means approved by BP or Shell, I would like to know more about it.