Type SB1A John crane

O-ring Pusher seals | Single, Heavy-duty Cartridge Seals

Type SB1A John crane

Features mechanical seal type sb1a

  • California Residents: PROPOSITION 65 WARNING
  • The springs are located in the stationary body of the seal, reducing risk of the springs becoming clogged.
  • PTFE slot rings replace the traditional O-rings in places where they are exposed to the product, preventing sticking.
  • Protected faces, the seal face carriers are driven by machined fits, preventing metal stress from distorting the face.

Recommended Applications type sb1a

  • Process pumps
  • Other rotating equipment

About Mechanical seal type sb1a

The Safeseal Type SB1A is a single-cartridge seal for use with clean fluids and lubricants. It is versatile, easy to install and maintain. Although the design of the seal is simple, it contains advanced technical features, such as patented seal face holders and elastic mating ring. Seal faces are installed using a patented heat shrink process ensuring correct, distortion-free face alignment at all recommended temperatures. The Type SB1A seal is applicable for a wide range of duties such as water, oil, solvents and pulp.
Several variant of the design available for different services:

Type SB1A — Single, balanced cartridge seal, imperial units (ANSI)

Operating range mechanical seal type sb1a

Temperature Limits


Pressure Limits

Type SB1 process pressure: 215 psi(g)/15 bar(g)

Type SB1A, SB1B, SB1S process pressure: 290 psi(g)/20 bar(g)

Speed Limits


Standard Materials

Seal faces: SiC/Carbon or SiC/SiC

O-rings: PTFE, EPDM, Viton, FFKM

Metals: AISI 329 and 316 standard, SAF 2507 for sea water applications, titanium, Hastelloy, UHB

Springs: Nimonic steel or Hastelloy, C276