SPECIAL REPORT: VALVES/ACTUATORS 40 HYDRAULICS & PNEUMATICS September 2023 www.hpmag.co.uk Danfoss Power Solutions has extended its PVG valve portfolio with the addition of PVG 48, a pre-compensated proportional control valve for mobile machinery. Designed for applications requiring flow rates of up to 180 litres per minute (47.6 gallons per minute), PVG 48 provides customers with a right-sized option between the existing PVG 32 and PVG 128 New proportional control valve for mobile machinery CFT-Green Valve Packing System reduces fugitive emissions and enhances safety of pipelines Celeros Flow Technology has launched a new sealing system – the CFTGreen Valve Packing System – which reduces fugitive emissions across pipelines and provides a safe and efficient sealing solution for valves. Engineers in the oil and gas, chemical, and power generation industries can now increase safety across their facilities and pipeline networks. Fugitive emissions occur when a valve leaks, and gases or liquids are released into the surrounding environment. It is critical to protect against fugitive emissions because they could have devastating consequences on the environment through the release of harmful pollutants, as well as posing a health and safety risk to people from the risk of explosion. Additionally, they could potentially cost an operator millions in lost product, fines and clean-up operations. The CFT-Green Valve Packing System is based on a stem spring loaded seal mechanism that provides superior performance and offers outstanding reliability with minimal maintenance. As a result, the solution enables users to minimize emissions, and thus reduce the risk of environmental damage, while improving safety. Traditionally, stationary loading packing seal solutions have been used to control fugitive emissions, but this type of packing gradually wears and fatigues, requiring regular adjustment. However, CFT-Green needs no packing tightness intervention during the seal’s lifetime. The spring in CFT-Green exerts constant and reliable pressure on the sealing element, ensuring a tight and robust seal even under extreme conditions, and the force from the spring helps to maintain the correct levels of compression throughout the seal’s long lifetime. This is a vast improvement compared with conventional packing, which suffers from loss of torque over PVG 48 maximises the power density of the PVG 32 interface. Its compact design also saves space and reduces weight while maximising performance. The new PVG 48 modules also offer a range of inlets, including PVPM 48 midinlet and PVSI 48 with P&T end plates, which can accommodate for the higher pump flow required. The complete PLUS+1 compliant actuator portfolio, as well as most PVG 32 accessories, can be applied to PVG 48, enabling a seamless integration with the pre-compensated valve family. PVG 48 is designed for use on all typical PVG applications, and has already been successfully applied in agriculture, material handling, and construction machinery, with customers in production. The valve is ideal for machines such as wheel loaders, aerial lifts, and cranes, where flow and controllability are essential. Commenting on the launch, Knud Meldgaard Jensen, global product portfolio manager for Spool Valve Solutions, Danfoss Power Solutions, said: “We designed the PVG 48 valve to have the same high performance and quality as the rest of our PVG proportional valves. By maintaining the design concept, an engineer can add this section to an existing application. The ability to do this without requiring a complete redesign ensures OEMs can easily optimise their machine using the entire PVG valve range. This helps by saving space and reducing weight and costs, which we know are critical factors for our customers.” valves. It greatly expands the range of medium-flow capabilities for original equipment manufacturers and distributors globally. The PVG 48 valve is designed to easily integrate with the existing line of Danfoss Power Solutions’ high-performance proportional valves, including PVG 256, PVG 128, PVG 32, and PVG 16. The modularity of the PVG portfolio enables five valve sizes to be stacked together. This allows hydraulic flow from high to low within the same valve stack, enabling precise and repeatable control and optimizing productivity for customers.
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