1. Compact structure: low volume, light weight and easy maintenance
2. Smooth flow channel: low flow resistance, low pressure drop and high flow
3. Three-eccentric multi-level compound seal butterfly valve: It uses the unique cam effect, so that during the valve's 90 ˇtravel the seat is totally disengaged from the disc seal ring without any friction.
Three-eccentric soft seal butterfly valve: The sealing pair is made of integral PTFE materials, which are suitable for applications with high medium cleanliness, frequent valve on-off and high requirements for sealing pair corrosion resistance. Especially it can ensure that its service life is basically the same as that of the pipe in the thermal system.
Three-eccentric metal seal butterfly valve: The sealing pair adopts a full metal seal structure. The sealing pair adopts a "hard-contact-hard" structure as shown in figure 1 pneumatic three-eccentric butterfly valve. The seal has a long service life. It is suitable for service conditions where the medium working temperature is extreme, the erosion is severe and there is the occurrence of "crystallization".
4. Strong anti-wear performance: The disc adopts a three-eccentric structure and the sealing face is subject to hard alloy overlaying welding with good anti-wear performance.
5. Valve flow characteristics: Approximate equal percentage. Control and shut-off can be realized.
The main technical parameters
Type: Straight-through flat offset casting body
Nominal diameter: DN50 ~ 1600 (NPS2 ~ 64)
Nominal pressure: PN 16 ~ 40 (Clsaa150 ~ 600)
Connection type: flange type, wafer type
Body material: A216-WCB, A351-CF8, A351-CF8M, A351-CF3,
A351-CF3M, A217-WC6, A217-WC9
Bonnet: Standard: -29 ~ 250 ˇ
High temperature (cooling fin) Type: 250 ~ 600 ˇ
low temperature (extension) type: -46~-29ˇ
See table 1 for working temperature and pressure ranges of various
materials.
Packing: PTFE, flexible graphite, nickel-based wire reinforced flexible
Graphite
Valve components
Disc type: three-eccentric rotarytype
Seat type: multi-level compound seal, soft seal, metal hard seal
See table 3 for material combination and surface treatment of body,
plug, seat and stem.
Flow characteristics: approximate equal percentage
Adjustable ratio: 30:1
Rated Cv value: See table 3 for details.
Rated travel: 0~60°or0~90°
Seat shut-off class: hard seal: ANSI Class IV, V
soft seal, multi-level compound seal: ANSI Class VI
Outline dimensions: See table 8 for details.
1:,
Table 1: design and manufacturing standards
|
Standard |
Design and manufacturing |
Face-to-face dimensions |
Flange dimensions |
Pressure and temperature ratings |
Inspection and testing |
Leakage class |
|
   National standards and  industry standards |
GB/T12224 GB/T12238 JB/T8527 |
GB/T12221 | GB/T9112~9124 HG/T20592~20635 SH3406JB/T79 |
GB/T9124 GB/T12224 |
JB/T9092 GB/T13927 |
GB/T4213 |
|
American Standard |
API609 | API609 | ASME B16.5 ASME B16.47 |
ASME B16.34 | API598 Â |
ANSI/FCI70-2 ASME B16.104 |
|
Other national standards |
 | JIS B2002 ISO5752 |
EN1092 | Â | Â | Â |
Â
2:
Table 2: Actuator
Â
|
Model Item |
Cylinder actuator |
Electric Actuator |
|
| AT/AW | ATK/AWS |
Determined according to ordering requirements |
|
|
Double-acting |
Single action |
||
|
Usage |
,Shut off ,Adjust | ,Shut off ,Adjust | |
|
Power supply |
:0.4~0.7MPa(G) Air supply: 0.4 ~ 0.7MPa (G) |
:220VAC/50HZ,380VAC/50HZ Power: 220VAC / 50HZ, 380VAC / 50HZ |
|
|
Connection |
:NPT1/4-Φ8, NPT3/8-Φ12, NPT1/2-Φ16 (),. All pneumatic valves of our company are provided with ferrule fittings connected to air supply pipelines of users. (See the specification of pneumatic valves for the sizes.) The ferrule fittings for air supply can also be supplied according to user requirements. |
: Electrical Connection: With electric actuator configuration or user requirements |
|
|  | :24VDC,220VAC :4~20mA,4~20mA+HART :GB/T4213-2008,"C",:±2.0%,:≤2.0%,:≤0.8%,: ≤+2.5% Shut off: 24VDC, 220VAC Control with positioner: 4~20mA, 4~20mA+HART Control with positioner: with positioner index class "C" in accordance with GB/T4213-2008, intrinsic error: ˇ2.0%, hysteresis error: ˇ2.0%, dead band: ˇ0.8%, full travel error: ˇ+2.5% |
:/ :4~20mA Shut off: On / Off Adjust: 4 ~ 20mA |
|
|
Action type |
Shut off: When the solenoid valve is powered on, the valve is on or off. Adjust: The valve is on or off with the increase of positioner input signal. |
Shut off: The valve is on or off when powered on Adjust: with the input signal increases valve opening or valve off |
|
|
Allowable ambient temperature |
-40ºC~+80ºC | -40ºC~+80ºC | |
|
Accessories |
Hand operated mechanism, solenoid valve, electric/pneumatic valve positioner, transponder switch, air filtering pressure relief valve, speed increaser, position holding valve, air control valve, etc. |
Hand operated mechanism, transponder switch, input/output switch signal, surge protector, local switch, selector switch, etc. |
|
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