Stainless Steel Pneumatic Butterfly Valve

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
dimensionsPressure and
temperature ratingsInspection
and testing
Leakage classNational standards and
industry standardsGB/T12224
GB/T12238
JB/T8527GB/T12221GB/T9112~9124
HG/T20592~20635
SH3406JB/T79GB/T9124
GB/T12224JB/T9092
GB/T13927GB/T4213
American StandardAPI609API609ASME B16.5
ASME B16.47ASME B16.34API598
ANSI/FCI70-2
ASME B16.104
Other national standardsJIS B2002
ISO5752EN10922:
Table 2: Actuator
ModelItem
Cylinder actuator
Electric ActuatorAT/AWATK/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.