ZDRWY series high-pressure butterfly valves have excellent cutting and regulating performance. They are equipped with electric actuator and high-pressure butterfly valves. The valve plate and sealing components adopt three-eccentric structure. The valve plate is shaped like an oval cone. When the valve is opened, the oval cone sealing surface is removed from the u-shaped resilient seat and then rotated to reduce friction and wear. When the valve is closed, the disc rotates. Under the action of the eccentric shaft, the disc automatically adjusts the center to the elastic seat. The pressure on the seat causes the deformation of the seat until the seat is closely matched with the oval cone sealing face of the disc. The two series of products have three functions, such as adjusting and cutting off and rapid cutting adjustment
specifications
Main technical parameters
A. the valve body
Type: flat offset cast valve body
Nominal diameter (DN) : 100 ~ 600mm
Nominal pressure (PN) : 2.5, 5.0 or ANSI 150, 300Lb.RF
Connection mode: no flange clamp
Materials: WCB, CF8, CF8M
Upper cover: standard and valve body cast together
Filling: asbestos - impregnated tetrafluoroethylene, teflon, flexible graphite
Internal assembly
Valve plate type: eccentric and rotary
Valve plate: CWB hard chrome, CF8, CF8M; CF8 or CF8M hardfacing alloy
The seat material and using temperature: CF8 CF8M 450 ℃ or less; CF8 or CF8M surfacing 450 ℃ or less
Shaft material: 2Cr13, 17-4ph
Shaft sleeve material: cast copper alloy of CF8 or CF8M (nitrification treatment)
Executive mechanism
NAPCU NA DKJ series
Input signal: 4 ~ 20ma.dc
Power supply voltage: 220v. AC/50HZ
Ambient temperature: - 20 ~ + 60 ℃
Valve type: electric - closed and electric - open
Main technical performance
Drain leakage quantity: hard seal in accordance with ANSI B16.104 Ⅳ level, less than 10-4 x Kv value, soft seal is zero
Basic error: + / - 1%
Return difference: 1%
· dead zone: 0.5%
Adjustable range: 50:1 (of the opening of the 90 °), 25:1 (70 ° degrees)
Turn Angle: 70 ° or 90 °
· rated flow coefficient Kv value: see zdrwr.y electrically adjusted shut-off butterfly valve
Actuator actuator arranged with allowable pressure differential pressure shot P
(1) complete electronic type (NAPCU) and electronic switch type (NA) actuator
(2) electric actuator (DKJ)
Main dimensions
The napcu.na series electric actuators are mainly in external dimensions
Note :(L1, L2, B, D, D1, n - sheng) these connecting sizes are as per ZS WY - 50 pneumatic high pressure butterfly valve
· the main external dimensions of the DKJ series electric actuator are provided
Note :(B, L1, L2, D, D1, n - sheng) these connecting sizes are as per ZS wy-50 pneumatic high-pressure butterfly valve
