GW/BAW Seal Brochure - FLOWSERVE - #1

Flow Solutions Division

Standard conventional liquid mechanical seals used in integrally geared API pumps and compressors including high speed and high pressure services.

GW/BAW

GW seals

Originating from the Flowserve GW gas seal used in LMC in-line compressors, the Flowserve GW liquid seals are traditional, flat-faced, hydraulically balanced, OD-pressurized, stationary multi-spring pusher end face mechanical seals run against a hard carbide rotor. API 682 refers to this as a Type A seal. An optional PTFE Tec-ring does not produce or transmit moments to the stationary face to cause it to lose relative flatness, react to temperature extremes, or hang up due to high friction like wedge-shaped PTFE elements can. GW liquid seals can be used in all integrally geared API pumps and assembled in any of the standard sealing arrangements: single, dual unpressurized, and dual pressurized.

- The standard balance liquid GW is recommended for fluids having a specific gravity between 0.60 and 1.50.

- The high balance liquid GWQ is recommended for light ends having a specific gravity between 0.30 and 0.60.

- The liquid lube groove GWW is specifically designed for direct drive unit use in hot water services up to 338° F (170° C) without the need for external cooling piping plans such as API Plans 21, 23, or 32 that would be costly to install and operate.

Materials of Construction

Metal Components: Rotating Face: Stationary Face:

Springs:

Secondary Seals:

Stainless Steel Tungsten Carbide

Resin Carbon or

Metallized Carbon Alloy C-276 Fluoroelastomer, Perfluoroelastomer,

PTFE/Elgiloy Tec-ring

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Operating Parameters

• Pressures:

• Temperatures:

• Shaft Speeds:

• Specific Gravity:

• Available Sizes:

To 675 psi (46.6 bar) -46° F to 400° F (-43° C to 204° C) To 18,000 rpm 0.30 to 1.50 1.250" and 1.500"

© 2002 Flowserve Corporation