What is CPVC Butterfly Valve?
The CPVC Butterfly Valve is a quarter-turn rotational speed valve for stopping, regulating and starting flow. In a butterfly valve a disc is mounted on the rotating shaft. The disc stops the line when the butterfly valve is completely closed. The butterfly valve’s disc is at right angles to the flow of gas or liquid when it is fully opened.
The valve can be completely closed or opened by rotating the handle 90 degrees. Large CPVC butterfly valves often have a gearbox attached, which connects the hand wheel to the stem via gears. This makes valve functioning easier, but it comes at the cost of speed.
CPVC butterfly valves are popular due to their dependability and low maintenance needs. Due to less wear, the useful life of the valve can be extended. This minimizes direct operating expenses and the number of hours spent on valve maintenance.
CPVC Valves Range
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The FE is a butterfly valve for shutting off or regulating flow, specifically designed for water applications and equipped with
a customisable Labelling System.
• Disk in PVC-U with through shaft
• Zinc plated square section steel stem completely isolated from the fluid
complying with standard ISO 5211: DN 40 ÷ 65: 11 mm DN 80 ÷ 100: 14 mm
DN 125 ÷ 150: 17 mm DN 200: 22 mm
• Can also be installed as a bottom discharge valve or tank dump valve
• Valve material compatibility (PVC-U) with water conveyance, drinking
water and other food substances according to current regulations
• Possibility of directly installing a gearbox or pneumatic and/or electric
actuators with a standard drilling pattern according to standard ISO 5211
F05, F07, F10
|Construction||Bi-directional centric butterfly valve|
|Size range||DN 40 ÷ 200|
|Nominal pressure||Wafer version|
DN 40 ÷ 50: PN 16 with water at 20 °C
DN 65÷200: PN 10 with water at 20 °C
|Temperature range||0 °C ÷ 60 °C|
|Reference standards||Flanging system: EN ISO 1452, EN ISO 15493, DIN|
2501, ISO 7005-1, EN 1092-1, ANSI B16.5 Cl.150
|Riferimenti Reference standards||Construction criteria: EN ISO 16136, EN ISO 1452, EN|
Test methods and requirements: ISO 9393
Actuator couplings: ISO 5211
|Valve material||Body: PVC-U|
Stem: Zinc plated carbon steel (C45). On request STAINLESS steel AISI 316
|Seal material||Liner: EPDM, FKM. On request NBR|
|Control options||Hand lever operated; Gearbox, pneumatic actuator,|
PRESSURE VARIATION ACCORDING TO TEMPERATURE
For water and non-hazardous fluids with regard to which the material is classified as CHEMICALLY RESIS- TANT. In other cases, a reduction of the nominal pressure PN is required (25 years with safety factor).
PRESSURE DROP GRAP
KV 100 FLOW COEFFICIENT
The Kv 100 flow coefficient is the Q flow rate of litres per minute of water at a temperature of 20°C that will generate Δp= 1 bar pressure drop at a certain valve position. The Kv100 values shown in the table are calculated with the valve completely open.
RELATIVE FLOW COEFFICIENT GRAPH
The relative flow coefficient is the flow rate through the valve as a function of the degree of valve opening. Horizontal axis: Percentage opening
of the disk Vertical axis: Relative flow coeffi-cient
OPERATING TORQUE AT MAXIMUM WORKING PRESSURE
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