These are Diaphragm Actuated Hydraulically Operated Valves used for many functions for the control of clean liquid: set-stop valve is one of the function.
Diaphragm type Digital Control Valves, electro hydraulically operated by diaphragm self fluid actuated type having resilient (soft) seating for zero leakage to leakage class VI as per ANSI FCI-70-2 (ANSI B16.104).
They use FT-100 (Globe Straight) or FT-4200 (Globe – Y) Basic valve, which is a pack less design, Top and bottom guided for vibration-free movement. The valve can be serviced without removing from the line. All Internal Parts are of complete stainless steel for very long life and corrosion-free. The body and cover are epoxy coated, inside and outside for smooth flow surface and longer life. These Digital Control Valve can be used very commonly for white Oil having max. Viscosity up to 30 CST.
› Low pressure drop in FT-4226-80R due to Y-pattern design compared to Straight Globe type FT-226-80R
› Contains 1 NO +1 NC Ex-proof Solenoid Valves connected to the Junction box with cable gland – All Electricals are CCOE / CMRI / PESO Certified
› Y-strainer in inlet tubing to any dirt particles coming with the fluid
› Opening speed control and closing speed control (Needle Valves) in the tubing circuit
› All stainless steel tubings and fittings
› Optional: – limit swithces as required (1 NO. or 2NO.) CCOE / PESO certified
› Diaphragm and other elastomers are available in Buna-N (Nitrile – 70 Shore-A) and Viton.
› Solenoid Valves with ‘F’ type coil is standard. Coil type ’H’ available for high temp. Service optionally.
› Solenoid Valve coil Voltage available in 240VAC/ 120VAC/ 24VDC/ 48VDC. Asco Make as Standard.
› Limit Switch assembly for taking signal into control room.
Flow age FT-226-80R / FT-4226-80R basically consists of a FT-100 / FT-4100 basic valve, 1 no. Normally open solenoid valve, Located on the inlet tubing, 1 no. Normally closed sol. Valve, in the outlet tubing. These two sol. Valves basically controls the operation of DCV in conjunction with the batch controller. Inlet control tubing contains a Y-Strainer, and closing speed control-needle valve. Outlet control tubing contain opening speed control – needle valve. The junction box is fixed on the valve cover and both sol. Valves are connected to the junction box thru electro plated brass cable glands. Limit switches are optional. All electrical are CCOE / PESO / CMRI certified.
›When both sol. Valves are de-energised, line fluid is placed inside the cover (above the diaphragm) keeping the valve in fully closed position.
›Energising NO (2) sol. Valve, keeps the fluid locked inside the cover and
keeps the valve in closed condition.
›By energising NC (3), low flow starts and again by de-energising NC (3) – while keeping no – energised, the valve is in hold position and continues to operate at low flow.
›After filling the pre-set volume of low flow, by energizing NC (3), the valve opens fully and starts delivering high set flow.
›Based on set high flow rate setting, it keeps receiving signals from the batch controller to maintain the set high flow rate by continuously energising and de-energising NC sol. valve.
›Again in the closing cycle, after the desired quantity has been filled, batch controller signals to de-energise NC (3) and keeps on de-energizing and energizing NO (2), untill the low flow conditions has been reached. The above sequence is repeated if multi-stage closing is required.
›When the full set quantity has been deliverd, it de-energises nc to fully close the valve.
›All the above is achieved with typical loading terminal system as shown In Diagram.
