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2625 Volume Booster

D200071X012

Product Bulletin

62.3:2625

January 2015

Specifications

Supply Pressure Ranges

When used in conjunction with a positioner or other

pneumatic accessory, always pipe the positioner and

volume booster with one common supply through a

Fisher 67D, 67DR, or 95H regulator (see figure 2). A

high‐capacity filter, such as the Fisher 262K, should

be installed in the supply line to the regulator. Supply

pressure also must not exceed the maximum

pressure rating of the actuator. Constructions are

available in two maximum supply ranges.

When Normally Used With Diaphragm Actuators: Up

to 2.8 bar (40 psig)

When Normally Used With Piston Actuators: Up to

10.3 bar (150 psig)

Input Signal Pressure

Positioner output

Maximum Input Signal Pressure

10.3 bar (150 psig)

Fixed Input‐to‐Output Pressure Ratio

1 to 1

Nominal Deadband

Percent of Positioner Output Span

(1)

2.4 mm (0.094 inch) exhaust port: 2%

9.5 mm (0.375 inch) exhaust port: 3.5%

12.7 mm (0.5 inch) exhaust port: 5%

Construction Materials

Body: Aluminum

Seat Ring: Brass

Diaphragms

2625: Nitrile/nylon

2625NS: EPDM/meta‐aramid

Upper and Lower Valves:

2625: Nitrile‐CSM rubber/aluminum/stainless steel

2625NS: EPDM/aluminum/stainless steel

O‐Rings:

2625: Nitrile

2625NS: EPDM

Connectors for Diagnostic Testing:

J Stainless steel

J brass

Operative Temperature Limits

(2)

2625: -40 to 71_C (-40 to 160_F)

2625NS: -40 to 93_C (-40 to 200_F)

Connections

Input Signal: 1/4 NPT

Supply and Output: 3/4 NPT

Port Diameters

(3)

Supply Port: J9.5 mm (0.375 inch) or

J 12.7 mm (0.5 inch)

Exhaust Port:

J2.4 mm (0.094 inch),

J9.5 mm (0.375 inch) or J12.7 mm (0.5 inch)

Maximum Flow Coefficients

See table 1

Hazardous Area Classification

Complies with the requirements of ATEX Group II

Category 2 Gas and Dust

Safety Instrumented System Classification

SIL3 capable - certified by exida Consulting LLC

Approximate Weight

2.3 kg (5 lb)

NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology.

1. Zero to maximum supply.

2. The pressure/temperature limits in this document and any applicable code or standard should not be exceeded.

3. May be used in any combination.

1 2 3 4 5 6 7 8

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