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FISHER 67CF Industrial Regulators
Reliable Fisher® Control Valve Solutions
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产品简介在线询价
The 3582 Series pneumatic valve positioners, shown in figure 1, and the Type 3582i electro-pneumatic valve positioners, shown in figure 2, are used with diaphragm-actuated, sliding-stem control valve assemblies. The pneumatic valve positioners receive a pneumatic input signal from a control device and modulate the supply pressure to the control valve actuator, providing an accurate valve stem position that is proportional to the pneumatic input signal.
Type 3582NS positioners meet typical requirements of the nuclear power industry. The Type 3582NS construction includes materials that provide superior performance at elevated temperature and radiation levels. The O-rings are EPDM (ethylene propylene) and the diaphragms are EPDM/Nomex. EPDM(1) demonstrates superior temperature capability and shelf life over nitrile. The Nomex diaphragm fabric demonstrates improved strength retention at elevated temperature and radiation conditions.
Available Configurations Refer to the Type Number
Description Input Signal(1) For 3582 Series: 0.2 to 1.0 bar (3 to 15 psig), 0.4 to 2.0 bar (6 to 30 psig), or split range, see table 1 For Type 3582i Only: 4 to 20 mA dc constant current with 30 Vdc maximum compliance voltage, can be split range, see table 1 Equivalent Circuit For Type 3582i Only: 120 ohms shunted by three 5.6-volt zener diodes, see figure 3
Output Signal(1) Type: Pneumatic pressure as required by actuator up to 95 percent of maximum supply Action(1): Field-reversible between direct and reverse within the pneumatic valve positioner
Supply Pressure(1) Recommended: 0.3 bar (5 psi) above actuator requirement Maximum: 3.4 bar (50 psig) or pressure rating of actuator, whichever is lower Maximum Input Bellows Pressure Rating 2.4 bar (35 psig)
Performance For 3582 Series: Independent Linearity(1): ±1 percent of output signal span Hysteresis(1): 0.5 percent of span
For Type 3582i Only: Independent Linearity(1): ±2 percent of output signal span Hysteresis(1): 0.6 percent of span Electromagnetic Interference (EMI)(1): When tested per IEC 801-3 (1984), change in steady-state deviation is less than ±1% at an electromagnetic field strength of 30 V/m from 20 to 1000 MHz. Positioner is tested with housing cap on and with external field wiring in rigid metal conduit.
For 3582 Series and Type 3582i: Open Loop Gain (Output Signal)(1): 100 in the range of 0.2 to 1.0 bar (3 to 15 psig) 55 in the range of 0.4 to 2.0 bar (6 to 30 psig)
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