Chesterton’s 442 Split Mechanical Seal construction enables the seal to handle pressures three and one-half times higher than conventional split seals. The 442 is the only split seal specifically designed to be able to withstand vacuum in the stuffing box. This makes it the ideal seal for main and auxiliary condensate pumps.

Fast, Easy Installation

The 442 provides the sealing capability of traditional mechanical seals without the need to disassemble and realign the pump. All parts are split to slip around the shaft and assemble in place. The 442 seal is a dramatic time saver with fast, easy installation, plus it can be rebuilt quickly and easily. Downtime is minimized and driver/equipment alignment is eliminated.

Main Features:

• Fast, easy installation without the need for pump disassembly.
• Specifically designed to seal in applications where stuffing box is in a vacuum.
• Fast, economical and easy rebuild of seal in the field eliminates the need for a spare seal.
• Adjustable gland fits  2, 3 or 4 bolt patterns.

Chesteron’s 442 Split Seal

• Static O-ring on shaft is held in captive groove for easy installation and rebuilding with no adhesive needed.
• Narrow contact area, balanced faces for low frictional heat.
• Optional hard face combinations available.
• Finger springs fixed to gland.
• Automatic stationary anti-rotation lock; no need to line it up at installation.
• Double captured gland half and rotary half gaskets prevent extrusion in service up to 400 psi (28 bar).
• Patent pending gland and holder screws - won’t fall out at installation.
• Patented Adjustable Gland™ tabs fit the widest range of bolt circles.
• Patent pending automatic centering; no shims or clips.
• Makes installation simple, even with short extension packing sleeves