Trunnion mounted ball valves for critical district energy needs

Complete range

Valves are designed for above ground and underground installations to operate reliably even in the most demanding conditions. The range includes full bore and reduced bore valves in DN sizes 150–900 with welded or flanged ends up to pressure class PN40.

High-performance

The design of the valves ensures lower operating torque which means that the valves are easy and light to operate. You can minimize your pressure losses and achieve savings by reducing your pumping costs.

Maintenance-free

Valves are designed and manufactured from high-quality materials to last the entire life cycle of the pipeline. They are equipped with an integrated drain valve which allows draining of the valve body to check the tightness of the valve, even when the pipeline is pressurized.

Reliable and safe

The valves have a leakage rate A and bi-directional tightness. They have several quality certificates and are tested in accordance with the district energy sector’s requirements. Blow-out safe stem construction ensures the safe operation of the valve.

Fast deliveries

Our highly automized production, efficient order-to-delivery process, and high stock levels ensure fast deliveries globally throughout the year.

Vexve trunnion mounted ball valves

Naval trunnion mounted ball valves

Find out the technical documents for the products.

Download the new trunnion mounted ball valves brochure for more detailed information.

Download the new trunnion mounted ball valves brochure for more detailed information.

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 450-900

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 450-900, 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.

Technical Summary

Applications

  • district heating networks
  • district cooling networks

Available

  • in sizes from DN 150 to DN 900
  • available in PN 16/25/40
  • with full bore or reduced bore
  • with welded connections according to EN (DIN) and GOST standards
  • also with flanged connections
  • with manual gear, electric, hydraulic or pneumatic actuator
  • with integrated drain valve and mounting bracket

Characteristics

  • temperature range: 0 °C – +200 °C
  • fully welded construction
  • maintenance-free
  • 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

  • solid ball
  • top flange ISO 5211
  • spring-loaded PTFE ball seats
  • blow-out safe stem construction
  • stem sealing with double o-rings