furniture各种阀的结构分析(英文)

2021年1月21日发(作者：airborne)
1. gate vv

This is the most common type of valve in use in industry and is used to start or stop
the flow of fluids. It gives a positive shut-off when closed and is often used as a 'Block
Valve' for isolating systems.

The gate valve MUST be either FULLY
CLOSED or FULLY OPEN and NEVER USED TO
CONTROL FLOW, as the fluid velocity will erode the valve internals
- gate and body
seats .. etc.



2. globe vv

The Globe valve is used where control of fluid flow or pressure is required and it can
be operated in any position between open and closed.


3. needle vv

This
is
simply
a
variation
of
the
Globe
valve
and,
as
its
name
implies
consists
of
a
narrow, tapered plug and port arrangement. The needle valve is, in itself, small in size
and is used for very fine and normally manual, control of fluid flow.

4. angle vv

Another
variation
of
the
Globe
valve
which
is
often
used
for
compressor
recycle
systems. It is also often used for dirty fluids. In this valve, the fluid flow enters from
below the plug and passes through an angle of 90°
to the outlet. An angle valve may
be manually or automatically controlled.

5. ball (plug) vv

These valves give a more streamline flow in their operation. The valve port is about
the same size as the internal pipe diameter. They are operated simply by turning a
handle through 90°
. They can give a fairly tight shut-off and some degree of control.