Fisher 3582 Pneumatic Single Acting Positioner , Type 3582i Electro Pneumatic Valve Positioner

Fisher 3582 Pneumatic Single Acting Positioner and Type 3582i Electro Pneumatic Valve Positioner
Fisher 3582 pneumatic valve positioners are used with diaphragm-actuated, sliding-stem control valve assemblies. This pneumatic valve positioner receives a pneumatic input signal from a control device and modulates the supply pressure to the control valve actuator, providing an accurate valve stem position that is proportional to the pneumatic input signal.

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.

Fisher 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 demonstrates superior temperature capability and shelf life over nitrile. The Nomex diaphragm fabric demonstrates improved strength retention at elevated temperature and radiation conditions.

In addition, the Type 3582NS positioner is qualified “commercial grade dedicated” under Fisher’s 10CFR50, Appendix B, quality assurance program.

These can be supplied as 10CFR21 items. Fisher Type 3582i electro-pneumatic valve positioner consists of a Type 582i electro-pneumatic converter installed on a Type 3582 pneumatic valve positioner.

Emerson Fisher brand 3582i positioner provides an accurate valve stem position that is proportional to a dc current input signal.The Type 582i electro-pneumatic converter, shown in figure 5, is a modular unit that can be installed at the factory or in the field(2). The converter receives a dccurrent input signal and provides a proportional pneumatic output signal through a nozzle/flapper arrangement. The pneumatic output signal provides the input signal to the pneumatic positioner, eliminating the need for a remote mounted transducer.
3582 Series Pneumatic and Type 3582i Electro Pneumatic Valve Positioners

Specifications

Available Configurations

Refer to the Type Number Description

Input Signal

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

For Type 3582i Only:

4 to 20 mA DC constant current with 30 VDC maximum compliance voltage, can be split range

Equivalent Circuit

For Type 3582i Only:

120 ohms shunted by three 5.6-volt zener diodes

Output Signal

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)

Maximum Steady-State Air Consumption(1)(2)

For 3582 Series

1.4 bar (20 psig) Supply: 0.38 normal m3/hr (14.0scfh)

2.0 bar (30 psig) Supply: 0.48 normal m3/hr (18.0scfh)

2.4 bar (35 psig) Supply: 0.54 normal m3/hr (20.0scfh)

For Type 3582i Only

1.4 bar (20 psig) Supply: 0.42 normal m3/hr (17.2scfh)

2.0 bar (30 psig) Supply: 0.53 normal m3/hr (21scfh)

2.4 bar (35 psig) Supply: 0.59 normal m3/hr (24scfh)

Maximum Supply Air Demand(1)(2)

For 3582 Series and Type 3582i:

1.4 bar (20 psig) Supply: 4.7 normal m3/hr (164.5scfh)

2.0 bar (30 psig) Supply: 7.0 normal m3/hr (248.5)

2.4 bar (35 psig) Supply: 8.1 normal m3/hr (285.5scfh)

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)

Operating Influences(1)

Supply Pressure, For 3582 Series Units: Valve travel changes less than 1.67 percent per bar (0.25percent per 2 psi) change in supply pressure

Supply Pressure, For Type 3582i Units: Valve travel changes less than 3.62 percent per bar (1.5percent per 2 psi) change in supply pressure

Operative Temperature Limits(1)

Standard Construction, For 3582 Series and

Type 3582i Units: –40 to +71_C (–40 to +160_F)

Type 3582NS Units: –40 to +82_C (–40 to +180_F)

with EPDM elastomers

High-Temperature Construction(3), For Types

3582A and C Only: –18 to +104_C (0 to +220_F)

Electrical Classification

For Type 3582i Only:

Refer to the Hazardous Area Classifications Bulletin

for specific approvals.

Housing Classification

For Type 3582i Only:

NEMA 3, IEC 60529 IP54: Mounting orientation
requires vent location to be below horizontal
 

Features

• For quick analog transmitter replacement, the instrument may be configured with default sensor data, zero level offset, differential process SG, and zero/span procedure only.
• Accurate, high-gain analog-to-digital conversion enables measurement of small changes in the process variable. This allows for use in difficult liquid level, interface, or density applications.
• An internal temperature sensor enables consistent performance of the digital level controller, despite ambient temperature changes.
• Mechanical safeguards designed into the digital level controller help to withstand physical abuse often incurred during installation or in transport, without compromising performance.
• Field wiring connections are in a compartment separated from the electronics. This protects the electronics from any moisture brought into the housing by the field wiring.
• Includes self-diagnostics that detect an error that may render the process variable measurement inaccurate.

 
Table 1. Split-Range Capabilities