Diaphragm Seals

Diaphragm Seals

Diaphragm seals are mechanical seals that use a flexible diaphragm element to transmit closing force to the sealing faces while maintaining controlled contact between rotating and stationary components in pumps and rotating equipment.

This seal design is commonly applied in clean-liquid and moderate-pressure pump duties where compact construction, stable face loading and dependable leakage control are required. Mechanical diaphragm seals are often positioned as elastomer diaphragm seals, balanced diaphragm seals or single spring diaphragm seals for pump-specific replacement and general process service.

Diaphragm seals are commonly used in:

• pumps
• process pumps
• water treatment equipment
• chemical service equipment
• light industrial rotating equipment
• general process duty systems

These seals are typically selected where buyers need:

• compact mechanical seal design
• reliable sealing in clean liquid service
• stable sealing face contact under normal operating conditions
• reduced leakage risk
• dependable replacement support for existing pump installations

Depending on duty, diaphragm seals may include:

• mechanical diaphragm seals
• elastomer diaphragm seals
• balanced diaphragm seals
• single spring diaphragm seals
• pump-specific replacement diaphragm seals

To specify the correct diaphragm seal, provide:

• shaft size
• seal chamber or housing dimensions
• equipment type
• fluid handled
• operating pressure and temperature
• speed and duty conditions
• existing seal sample or drawing if replacing

Kaybin supports replacement diaphragm seals, reverse engineering from existing units and seal selection for pumps and rotating equipment across South Africa and Africa.