Trunnion Mounted Carbon Steel Ball Valve With Gear Operation
Ball valve of this series has the fixed ball, under any pressure,
the ball won't move Under pressure of spring and the medium, push
valve seat to realize good sealing ,So valve seat won't suffer too
much pressure, has little deformation, small operation torque and
long service life. Its service life is 2~3 times of ordinary O type
ball valve, which is specially applicable for high pressure and
large diameter
Specifications
- Temperature Range: -20°C to 190°CMaximum
- Working Medium: Water, Oil, Gas, Acid, etc
- Design: API 6D/API 608; DIN3357; EN 13709; BS5351; JIS 2071
- Inspection&Testing: API 598/API 6D; DIN 3230; EN 12266; BS5146;
JIS B2003
- Face to Face:ASME B16.10; DIN 3202; EN 558; BS2080; JIS B200
Overview
The trunnion ball valve is a form of quarter-turn valve which uses
a hollow, perforated and fixed/supported ball to control flow
through it.
A trunnion mounted valve means that the ball is constrained by
bearings and is only allowed to rotate, the majority of the
hydraulic load to be supported by the System constraints, resulting
in low bearing pressure and no shaft fatigue. The line pressure
drives the upstream seat against the stationary ball so that the
line pressure forces the upstream seat onto the ball to cause it to
seal.
The mechanical anchoring of the ball absorbs the thrust from the
line pressure, preventing excess friction between the ball and
seats, so even at full rated working pressure operating torque
remains low. This is particularly advantageous when the ball valve
is actuated because it reduces the size of the actuator and hence
the overall costs of the valve actuation package.
Advantage
Trunnion ball design is the lower operating torque, ease of
operation, minimized seat wear (Stem/ball isolation prevents side
loading and wear of downstream seats improving performance and
service life), superior sealing performance at both high and low
pressure (a separate spring mechanism and upstream line pressure is
used as the sealing against the stationary ball for low pressure
and high pressure m applications).
The trunnion is available for all sizes and for all pressure
classes but they are not suitable for throttling purposes.
Application
The trunnion ball valve is used for cutting or connecting the
medium in various pipelines of class150-class2500 and pn16-pn320.
It can be suitable for various media such as water, steam, oil,
liquefied gas, natural gas, coal gas, nitric acid, acetic acid,
oxidizing media, urea and etc. It is widely used in such industries
as chemical industry, petroleum, natural gas, metallurgy and etc.
The driving modes of the trunnion ball valve include worm and worm
gear driving, manual driving, pneumatic driving and electric
driving. The trunnion ball valves generally adopt flange
connection, and butt-welding connection is also adopted. The seat
can be soft seal seat or metal hard seal seat.
FAQ
Q: Are you trading company or manufacturer ?
A: We are a factory.
Q: How long is your delivery time?
A: According to the order,7~60days.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay
the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30%
T/T in advance ,balance before shippment.
