Valves catering to different functions
Any
system or process requires mechanical devices to control the flow and pressure.
The valves are meant for controlling the flow rate which is essential to travel
from one location to another in any mechanical device. Generally two ports are
contained in valves which are inlets and outlets. These ports are basically to
seal which flows in the devices or an orifice.
The primary functions of valves are
- Starting and arresting the flow
- Increasing or reducing the flow
- Controlling and directing the flow
- Regulating and monitoring the flow or process pressure
- Relieving the pipe system of certain pressure
Variety
of valves such as Gate, Globe, Ball etc are available with number of models
with different features and functional capabilities. These walls have distinct
advantages and disadvantages hence they are used in industries like heavy
engineering, perto chemicals, oil refineries, chemical and plastic industries
and many more. The valves some of them are self operated while others manually
or with an actuator or operated pneumatically or hydraulically.
A
ball valve is a device with a spherical closure unit that provides on and off
control for the flow. In this case the sphere has a port known as bore through
the centre. This valve when positioned in line with the direction of the
pipeline, it is in open position which allows fluid to flow and when rotated 90
degrees the bore becomes perpendicular for the flow to obstruct the passage. As
the name implies, ball valves are stop valves that use a ball to stop or start
the flow of the fluid. The ball performs similar functions as the disc in blow
ball.
Generally
valve handle is operated to open the valve when the ball rotates to a point
where the hole through the ball is in line with the valve body inlet and
outlet. Similarly when the valve is shut, which requires only a 90 degree
rotation of hand wheel for most valves and the ball is rotated to make the hole
perpendicular to the flow openings and the ultimate flow is stopped.
Types
of ball valves
This
ball valve has additional mechanical anchoring at the top and bottom on the
ball. The special trunnion mounting is suitable for larger and higher pressure
valves. This design allows for reduction in valve torque as the ball is
supported in two places. The Trunnion Mounted stem absorbs the thrust from the
line pressure there by preventing excess friction between the ball and seats
thus even at full rated working pressure operating torque remains low.
CAMARON
T31 BALL VALVE IS TRUNNION MOUNTED .
Applications
Ball
valves can be used in variety of applications in transmission and storage, gas
processing, industrial and many functions.
Jeffrey
Joseph, Product Manager for the Camaron Ball Valves explains “Ball valves
provide reliable leak protection which is exclusively beneficial in gas
applications”. They have low pressure drop which open and close quickly.
