Rajkot, Gujarat, India
Our Products
MASCOT HiFlo Positioners are Pneumatic and Electro-Pneumatic Positioners primarily used by MASCOT Control Valves equipped with Linear or Rotary Actuators.
A pneumatic module for 0.2-1.0 bar air control signals, or an electro-pneumatic module for 4 to 20mA electrical control signals is offered with MASCOT HiFlo valve positioner. Valve positioners are single or double-acting, force-balanced instruments that provide fast, sensitive and accurate positioning of MASCOT Spring Cylinder Actuators as well as diaphragm actuators. These rugged positioners being compact, field reversible, are designed for high performance. They offer separate Zero and Span adjustment for ease of calibration.
The MASCOT HiFlo Valve positioner is a force-balanced instrument. Positioning is based on a balance of two forces; one proportional to the instrument signal and the other proportional to the stem position. A downward force is activated as the signal pressure acts upon the diaphragms in the instrument signal capsule, through the follower arm and cam, the motion of the actuator stem is transmitted to the top end of the feedback spring resulting in the varying of tension in feedback spring as stem position changes.
The system will be in equilibrium and stem will be in the position called for by the instrument signal when these opposing forces balance exactly. The balance will move up or down and by means of the spool valve, will change the output pressures and flow rate if these opposing forces are not in balance. This will lead to the piston to moving until the tension on the feedback spring opposes exactly the instrument signal pressure.
The VFlo Segmented Ball Valve is designed to provide effective control for demanding applications. It is a rugged design segmented ball valve which overcomes the problems of harsh, particle entrained processes, and fibrous/unclean services. The VFlo also provides accurate, reliable control in a broad range of applications, such as Chemical, Power and Oil & Gas, Petro-Chemical & Pulp & Paper.
The VFlo addresses and solves many long-standing challenges faced by traditional ball valves like:
Metal Seal:Using the pressure drop across the valve, flex-lock sealing energises the seal to bubble tight shutoff in either flow direction. ANSI class IV is achieved with a metal seal.
With an increased differential pressure, the sealing capacity is increased with flex-lock. With the pressure entering the cavity with the shaft downstream, the flexible seal deflects into the ball, and causes it to seal tighter against the ball. With pressure entering the cavity with the shaft upstream, the back-up ring locks the seal against the ball and causes it to seal tighter against the ball.
Soft & Dual Seal:Using the pressure drop across the valve for soft sealing as well, the VFlo energises the seal to bubble tight shutoff in either flow direction. ANSI class VI is achieved with a soft seal and ANSI class IV with a dual seal.
The Soft seal ring is standard for the VFlo and utilizes a 316 SS or Inconel Ring as a backup in conjunction with a Filled PTFE / PEEK seat. Such design provides for a quick and easy replacement in case of failure. The backup ring also provides shear action hence scraping any developments on the ball.
