UTEX Industries, Inc. MB & MBH Mechanical Seal

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UTEX Industries, Inc. MB & MBH Mechanical Seal

	MB/MBH Mechanical Seal
View Available Models		View Product Specification Sheet
More Technical Information		View Brochure
Features and Benefits
Contact us about the MB & MBH

MB & MBH Technical Data			The UTEX MB metal bellows seal provides unitized construction with superior nestled ripple bellows design. It is designed for applications involving more viscous fluids, such as mud pumps, and crude oil handling, as well as aggressive chemical applications. Standard materials are 316 stainless steel end fittings with a Hastelloy C bellows core. All Hastelloy C construction (MBH) is also available. A carbon face is standard, and tungsten or silicon carbide faces are optional. The static o-ring seal eliminates shaft or sleeve fretting. The welded bellows core provides 360° face loading to reduce vibration and frictional heat. This integrally balanced seal handles pressure from vacuum to 300 psi. The seal remains clean running because of the rotating bellows which generates a centrifugal force to expel abrasives. UTEX MB seals are available in 15/16" through 4" sizes. Consult UTEX for specific design application information.
Part	Materials
Metal Components	MB - Hastelloy C-276 bellows core, 316 SS end fittings MBH - All Hastelloy C-276
Seal Face	Standard - CNFJ-B grade carbon. Available - Tungsten carbide and silicon carbide.
O-Rings	Standard - Viton Available - EPDM, Neoprene, Nitrile, Chemtex, Aflas, Chemraz, Kalrez, and encapsulated Viton.
Parameter	Operating Range
Temperature	-75°F to +450°F (-60°C to +232°C) depending on o-ring material chosen.
Pressure	OPERATING: Up to 300 psi (20 bar) STATIC: Up to 350 psi (24 bar) Dependent upon seal size.
Speed	Up to 4500 fpm (23 m/s).

MB & MBH Features and Benefits

Features	Benefits
1. No dynamic o-rings.	1. No shaft or sleeve fretting and eliminates frictional drag associated with dynamic o-ring.
2. Straight-line, pressure-balanced.	2. Does not require stepped sleeve or shaft.
3. Light face load.	3. Cooler running because of less friction.
4. "MB" has Hastelloy "C" bellows core and 316 stainless steel end fittings as standard. ("MBH" is all Hastelloy C construction)	4. More corrosion resistance than AM350.
5. Nestled ripple bellows design.	5. Even 360 degree face loading.
6. Unitized construction.	6. Ease of handling; no springs, clips or sliding gaskets; fewer parts.

More Technical Information About the MB & MBH

Seal/Shaft Size	Seal O.D.	Installed Length	O-ring H	Set Screw Size X Length J
INCH/MM
A	B	C
Convert to Metric

Available MB & MBH Rotating Units

Shaft Size (Standard)	Shaft Size (Metric)	Seal Type, Face, Elastomer	PDN Number

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