Vexve steel ball valves
Available in sizes from DN 10 to DN 1200
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Steel ball valve features
Fully welded structure of high quality materials
- pressure vessel steel
- suitable for many different applications and withstands varying water quality
- lightweight and space-saving design
- practically maintenance-free
Floating ball structure with spring loaded ball seals
- total bi-directional tightness (EN 12266-1, leakage rate A)
- tolerates thermal expansion axial loads
- takes pressure shocks without damage to the structure
Blow-out safe stem construction
- Ensures safe valve operation
- 90-degree position limiter
- valve position is always readable
Easy to install and insulate
- lightweight and simple to install
- the entire valve is easy to insulate
- no leakage risk
- no condensation problems
Trunnion mounted steel ball valve features
Trunnion mounted design
In the trunnion mounted ball valve design, the sealing rings are floating and the ball is fixed. The ball and the stem are attached to each other on both sides of the ball, which provides more support, especially as the ball size increases.
The fully welded construction of the trunnion mounted ball valves increases district heating lines’ lifetime as it eliminates the risk of leakage and air ingress. The face-to-face lengths of the valves are standardized, which guarantees space-saving installation of the valves. Valves can be installed in any position and have four lifting lugs, which makes the moving and turning of the valve easier even in locations where the space is limited.
Double block and bleed functionality
The double block and bleed functionality allows draining of the valve body to check the tightness of the valve, even when the pipeline is pressurized. The draining of the valve body is possible to do in both valve positions — open or closed.
The medium flows through the valve when the valve is in the open position. The seats ensure that the valve is tight. Testing the tightness of the valve can be done by closing the valve and draining the accumulated medium from the ball cavity. After the ball cavity is empty, you can check that the valve is tight by noticing that the flow from the draining valve stops.
Stem construction in sizes DN 150-400
Vexve's trunnion mounted ball valves have a blow-out safe stem construction, which ensures safe operation of the valves at all times. The position of the valve is always visible from the top of the valve stem. In sizes DN150-400, the stem sealing construction includes triple O-rings, which guarantee complete tightness. The top two O-rings can be easily replaced if needed.
Stem construction in sizes DN 450-1200
Vexve's trunnion mounted ball valves have a blow-out safe stem construction, which ensures safe operation of the valves at all times. The position of the valve is always visible from the top of the valve stem. In sizes DN 450-1200, the stem sealing construction includes five O-rings, which guarantee complete tightness. The top two O-rings can be easily replaced if needed.
Single piston effect
The seats have a single piston effect (SPE) which means that the seats are able to relieve increased pressure automatically from the cavity of the valve body to the district energy network.
The pressure in the body cavity can increase for example due to temperature changes.
Steel ball valve main characteristics
district heating networks
district cooling networks
HVAC side of heating and cooling systems as well as compressed air and oil networks etc.
in sizes from DN 10 to DN 1200
with full bore or reduced bore
with welded connections according to EN (DIN) and GOST standards
also with flanged or threaded connections
with manual lever, manual gear, pneumatic, electric or hydraulic actuator
fully welded construction
easy to insulate
space saving design
easy to install and use
long service life
total bi-directional tightness (EN 12266-1, leakage rate A)
high Kv value (minimum pressure loss, minimized pumping costs)
high-quality materials, suitable for many different applications
stainless steel or stainless material plated ball
spring loaded PTFE ball seals
blow-out safe stem construction
stem sealing with double o-rings