Flowserve Durametallic MD-200 Series Installation Instructions Manual Download Page 5

5

3  Seal Barrier Gas Supply

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

engineered to operate with non-humidified gas supplied to the seal 

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

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

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

and shaft size must be specified when the seal is ordered.

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

conditioned or humidified barrier gas. Nitrogen gas, humidified with a 

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

4  MD-200 Seal Piping

4.1 

Install piping for the clean nitrogen

 to the canister tap. A filter, 

pressure regulator, flow meter, check valve and pressure indicator 

are recommended.

Note: A conditioner or humidifier 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

  

Check

Valve

N

Source

Pressure

Regulator

Pressure

Indicator

Bypass

Humidifier

(optional: use only with 

#5 carbon rotor faces)

Flow

Meter

Barrier

Gas

Inlet

2

Filter

Summary of Contents for Durametallic MD-200 Series

Page 1: ...Installation Instructions Experience In Motion Durametallic MD 200 Series Conditioned Gas Dual Cartridge Canister Seal for Mixers and Agitators...

Page 2: ...vessel flange O ring gasket 1 6 Check requirements for the shaft and the vessel flange They must agree with the dimensions shown in Figure 1 1 7 Check the assembly drawing accompanying the seal assem...

Page 3: ...and have a 1 6 m 63 inch Ra finish or better Bearings drive and coupling must be in good condition Maximum vertical shaft movement axial end play 0 61 mm 0 024 inch FIM Maximum static vessel flange o...

Page 4: ...bly onto the adapter plate Do not bolt the canister seal assembly to the adapter plate or vessel flange at this time Care should be exercised when passing the seal sleeve incorporating the sleeve pack...

Page 5: ...l require a conditioned or humidified barrier gas Nitrogen gas humidified with a polar compound water is the barrier fluid of choice 4 MD 200 Seal Piping 4 1 Install piping for the clean nitrogen to t...

Page 6: ...essel pressure specified for the application This could reduce the recommended vessel to barrier differential pressure which could adversely affect seal performance 5 4 Do not exceed the maximum vesse...

Page 7: ...number A spare backup seal should be stocked to reduce repair time When seals are returned to Flowserve for repair decontaminate the seal assembly and include an order marked Repair or Replace A sign...

Page 8: ...train its employees and contractors in the safe use of Flowserve products in connection with the specific application While the information and specifications contained in this literature are believe...

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