The ZDRWR (soft seal) and ZDRWY (hard seal) are equipped with the electric actuator and VWR or VWY butterfly body parts.
The butterfly valve body part of VWR soft sealing butterfly valve is two eccentric valve plate structure, VWY hard sealing butterfly valve body part is three eccentric valve plate structure, has low friction, low torque when closed, allows large pressure difference, good sealing, there is no stuck phenomenon. Hard seal structure of the valve plate seal face can be too lai alloy welding, because the product is with regulation, to cut off the two functions of the new regulator, small volume, light weight, strong, compact structure, simple flow, small pressure loss, large rated flow coefficient, has good control ability, wide application range, the installation position can be arbitrary choice.
specifications
Main technical parameters
A. the valve body
Type: flat offset cast valve body
Nominal diameter (DN) : 50 ~ 1200mm
Nominal pressure (PN) : 0.6, 1.0, 1.6, 2.5 or ANSI 150, 300 FF RF
Connection mode: no flange clamp or flange FF RF
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: WCB 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
Ptfe 180 ℃ or less
Para eps 350 ℃ or less
Executive mechanism
Type: 3610R series electric actuator; SHQ series electric actuator
NUCOM series electric actuator; PSQ series electric actuator
Input signal: 4 ~ 20ma.dc
Power supply voltage: 220v. AC/50HZ
Manual operation: SHQ, PSQ: handwheel; 3610SR, NUCOM: portable handle
Note: detailed information of actuator is shown in the pamphlet
Ambient temperature: - 20 ~ + 60 ℃
Type of valve action: electric - closed and electric - open
Main technical performance
Drain leakage quantity: metal hard seal in accordance with ANSI B16.104 Ⅳ level, less than 10-4 x valve rated capacity, soft seal is zero
Basic error: 3610R actuator is + / - 1%; The operating agencies of SHQ and NUCOM were + / - 1.5%. The PSQ executive mechanism is + / - 1%
Back difference: the actuator of 3610R is 1%; The executive agencies of SHQ and NUCOM are 1.5%. The PSQ actuator is 1%
· dead zone: 0.5%
Adjustable range: 50:1 (of the opening of the 90 °), 25:1 (70 ° degrees)
Rated stroke: 70 ° or 90 °
Rated flow coefficient Kv value
Actuator actuator arranged with allowable pressure differential pressure shot P
Note: 1. F. P determination basis: valve close P2=0, flow direction is low and high; 2. NUCOM electric actuator is adjustable, and the two types are UNIC
External dimensions, weight
Shape and size (1)
Shape and size (2)
Note: 1. PN1.6MPa valve
