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Wafer metal seated butterfly valve
PN: 10/16/25 bar
Class(Lb): 150Lb, 300Lb
DN(mm): 50-1200
Size(inch): 2"-48"
Working temperature: -29---425o C
Seal: three-eccentric sealing,triple offset
Type of connection: wafer,flange,welding
Operator: pneumatic,electric,hydraulic,manual lever,worm gear
Body & disc material: ASTM WCB, CF8, CF8M
Stem material: ASTM A105, F6a, 304, 316
Sealing face material: Stainless steel, STL
Suitable medium: Water, oil, gas, steam, acids
Certificates: CE, ISO 9001
Design & manufacture Std.: GB/T12238, JB/T8527, ANSI B16.34, API609, MSS SP-68, JIS B2032, JIS B2064
Face to face Std.: GB/T12221, ANSI B16.10, API609, MSS SP-68, JIS B2002
Connection dimension Std.: JB/T79, GB/T9113, SH3406, HG20592, ANSI B16.5, API 605, JIS B2212, JIS B2214
Test Std.: GB/T13927, JB/T9092, API 598, JIS B2003
Electric actuator parameter
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Technical Parameters
Working environments
Temperature: -30'C~+70'C(can be customized to -45'C~+85'C)
Relatively humidity: 95%(25'C) Pressure: 86kPa~106kPa
Power Supply
Single phase: 220V 50Hz   Three phase:380V 50Hz
Tolerance: Single phase Voltage(-15%/+10%)  Three phase Voltage(±10%) Frequency(±5%), harmonic  content (<5%), Direct Current (±10%)
Insulation resistance
1)Resistance between input terminal and case should be more than 20M .
2)Resistance between input terminal and power supply terminal should be more than 50M . 3)Resistance between power supply terminal and case should be more than 50M .
The motor insulation levelÂ
Level F(Level H is selectable)
Protection level
IP68(underwater 20M\96hours)
Anti-explosion level
EXDÂ IIBT4\EXDÂ IICT4
 On-Off Type
Start frequency
650 times per hour
Designed lifetime
Minimum maintenance-free time:30,000 times
Working form
Short time working type, rated run time will be 15mins(customized to 30mins)
 Regulated Type
Start Frequency
1200 times per hour
Designed lifetime
No less than times
Working form
Intermittent periodic-type, minimum rated load sustained rate is 25%
Basic parameters
Basic error: ≤ ±0.1%
Hysteresis: ≤ 0.5% Dead zone: 0.1%~9.9% continuously adjustable Damping characteristic: undamped
Input and output signal
Analogue input 4-20mADC, input impedance ≤ 250 ;
Analogue output4-20mADC, load resistance ≥ 750 ; Linear error ≤ 0.5%; Supply voltage: 24VDC provided by internal actuator; Actuator with a build-in servo amplifier; Input and output signal channel take optoelectronic  isolationÂ
Passive junction capacity: 250V/5A AC; 30V/5A DC.
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High Performance Electric Triple Offset Three-Eccentric Metal Seated Seal Wafer Butterfly Valve D973hyf