Flowserve MD-200 Series Durametallic Manuel d'utilisateur télécharger pdf (Page 5)

3 Seal Barrier Gas Supply

The standard MD-200 seal design, using #22 carbon rotor faces, is

engineered to operate with non-humidied gas supplied to the seal

chamber at a consistent pressure 2 bar (25 psig) above the maximum

vessel pressure. Nitrogen gas is the barrier uid of choice. The gas to be

used, maximum vessel pressure, shaft speed, temperature, equipment

and shaft size must be specied when the seal is ordered.

Note: MD-200 seal designs using #5 carbon rotor faces, still require a

conditioned or humidied barrier gas. Nitrogen gas, humidied with a

polar compound (water), is the barrier uid of choice.

4 MD-200 Seal Piping

4.1 Install piping for the clean nitrogen to the canister tap. A lter,

pressure regulator, ow meter, check valve and pressure indicator

are recommended.

Note: A conditioner or humidier is recommended when using MD-200

with #5 Carbon rotor faces.

4.2 Bearings (optional) have been pre-lubricated during seal assembly.

Recommended Piping for Dual Conditioned Gas Seal

Figure 2

Check

Valve

Source

Pressure

Regulator

Pressure

Indicator

Bypass

Humidier

(optional: use only with

#5 carbon rotor faces)

Flow

Meter

Barrier

Gas

Inlet

Filter

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Flowserve MD-200 Series Durametallic Manuel d'utilisateur Page 5