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2625 Volume Booster

D200071X012

Product Bulletin

62.3:2625

January 2015

Installation

Figure 2 shows typical installations for the 2625 or

2625NS volume booster on piston and diaphragm

actuators. A single regulator that supplies both the

positioner and booster (or boosters) is recommended.

The supply medium must be clean, dry, oil‐free air or

non‐corrosive gas.

Note

Use a clean, dry, oil‐free air supply with instruments

containing EPDM components. EPDM is subject to

degradation when exposed to petroleum‐base lubricants.

Keep in mind that many actuators require larger casing

or cylinder connections to take full advantage of the

booster's ability to deliver its high‐volume output.

Dimensions are shown in figure 3. Ensure that the

supply pressure is connected to correspond with the

flow arrow on the booster.

Ordering Information

When ordering, specify:

1. Supply and exhaust port sizes. See table 1 for Cv

values.

2. Supply pressure range of up to 2.8 bar (40 psig) or

up to 10.3 bar (150 psig).

3. Stroking speed information when being mounted at

the factory, for proper tuning of the instruments.

Specify either critical or non‐critical stroke speed

time.

Note

Critical stroke speed time example: Valve to stroke in both

directions in 4 seconds or less.

Non‐critical stroke speed time example: Valve to stroke in

approximately 4 seconds in both directions.

4. Nuclear service, if applicable. Consult your Emerson

Process Management sales office for ordering

assistance.

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Emerson 2625NS Scheda Tecnica Pagina 6