CHESTERTON’s 155 Single Cartridge Mechanical Seal is a versatile and cost effective sealing device for many applications.

• Advanced face design resists distorting effects of pressure and temperature to maintain flatness in hot water and fuel oil applications. 
• Completely adjustable gland allows this ingenious design to fit a wide range of equipment bolt circles and bolt sizes without modification.

Chesterton has further enhanced the 155’s versatility by developing the 155 A, API configuration and the 155OS for oversized stuffing boxes.

CHESTERTON’s 155API puts the 155 emissions control capability in an API configuration.

• The 155 offers superior emissions control with the ease and economy of single cartridge sealing while meeting the API 610 standard.
• Controlled geometry and monolithic faces exhibit controlled thermal growth and maintain full face contact throughout temperature cycling for consistent emissions control in refinery and petrochemical services.

CHESTERTON’s 155CPI Cartridge Single Mechanical Seal

• Versatile and cost effective sealing device with a cast, slotted CPI Gland.
• Advanced face design resists distorting effects of pressure and temperature to maintain flatness in hot water and fuel oil applications. 

CHESTERTON’s 155OS, for oversized stuffing boxes 

• Oversized Gland is a versatile and cost effective sealing device for many applications.
• Advanced face design resists distorting effects of pressure and temperature, maintains flatness in hot water and fuel oil applications.
• Completely adjustable gland allows this ingenious design to fit a wide range of equipment bolt circles and bolt sizes without modification.

Easily Minimizes Inventory

• Seal can be rebuilt using a hardware kit and individual faces.
• Seal repair and material changes are greatly simplified.
• Inventory can be minimized to necessary shaft sizes and varied spare faces for application flexibility.
• Can be used in thousands of different applications, the 155 is a proven performer.

Chesterton’s 155 Cartridge Single Mechanical Seal:

• All O-rings are either static or move on non-metallic, non-fretting surfaces.
• Eliminates wear and the need of refurbishing sleeves or shafts.
• Seal face support shoulder is precisely square.
• Integral drive pads cannot fall out.
• Hydraulically balanced faces for low frictional heat.
• Reduces the crystallizing of salt water at the seal faces.
• Flush port can be rotated 360° for ease of piping as required.
• Stationary springs, isolated to prevent clogging from crude oil, sludge, mud, seaweed and other marine debris.
• Patented Adjustable Gland fits common bolt arrangements without modification.
• Self-Centering Lock Ring for superior concentricity.
• Prevents face wobble and spring fatigue.
• Centering strap for simple installation.