Articles & Case Studies

Control valve innovation improves pressure regulation whilst reducing cavitation

Posted: Wednesday 23rd November 2011

Tyco Valves & Controls is pushing the boundaries in control valve design and engineering with its Sapag Monovar pressure control valve.

With excellent cavitation characteristics which make it suitable for high pressure drop applications, the valve is able to control a high pressure differential in relation to its inlet pressure. Very accurate flow and pressure regulation capabilities ensure the valve is well suited to industrial water applications in water distribution, hydro-power stations and process industries.

Monovar uses an innovative sliding plate design which incorporates one moving plate upstream, one fixed plated downstream and approximately 56 tapered control ports. Significantly reducing water turbulence, it settles any disturbed water within two lengths of the valve diameter as opposed to the five lengths required for traditional butterfly valves, providing quick flow recovery. This design feature, including the short face to face dimension in comparison to traditional control valves such as gauge valves or globe valves, allows for compact installation. It ensures pipeline system designers have more flexibility in designs and layout, allowing for a smaller footprint upon installation which reduces construction costs and plant size.

When fully closed the valve has a leak rate comparable to AMSE B16.104 Class III and can be operated both manually or by using pneumatic, hydraulic or electric modulating actuators. In addition it can be used at a differential pressure which is 80% of the inlet value, with a pressure range of 50 bar and a temperature range from 60oF to 390oF. Sapag, located in France, also extended its size range recently up to DN 2100 (84”).

Tyco Valves & Controls has engineered the valve for improved reliability and endurance, ensuring customers can take advantage of predictable performance. The multi-jet design also reduces the destructive effects of cavitation and extends the lifecycle of the product.

Julien Massemin, product manager for the Monovar valve at Tyco Flow Control comments:

“We have designed and engineered our product with optimum flow characteristics to address the industry’s requirements for improved performance, extended lifecycles and reduced operation costs. Excellent anti-cavitation properties eliminate the risk of potential damage to the valve or the downstream pipe line, ensuring a cost reduction in comparison to conventional solutions.”

In total 17 DN 2100 valves have recently been specified for a new ultraviolet disinfection facility in the US and are currently undergoing installation. As part of a $10 million contract, the products are a key component for accurate flow and pressure control within a new facility on the East Coast. Upon completion, the new plant will supply water to a major city, with Monovar valves controlling approximately nine billion litres/2.4 gallons of water.

“We are truly proud to be involved in this project,” adds Julien. “Close coordination of our global teams enabled us to not only meet our customer’s objectives, but also exceed their expectations by delivering our products ahead of schedule at the beginning of the programme.”

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