Multi & Wave Spring Seals

Multi Spring Seals

Multi Spring seals are bi-directional and commonly used in more arduous conditions.

The standard designs feature a PTFE Wedge shaft seal that is chemically inert.

This wedge is loaded by the springs and exerts a consistent force on the shaft providing a positive seal.

Multi Spring seals are ideal for corrosive and chemical applications. Their suitability for less arduous applications is enhanced by designs that feature an o-ring in place of the wedge. These designs are more cost effective and generally utilized where demands are not too great.

Styles MC0, MCS, MD0 & MDS are compact designs in accordance with DIN 24960 (EN12756) and ISO3069.

Styles ME0, MES, MF0 & MFS are a thin section design and conform to ANSI B73 making them suitable for American equipment. All M type seals are positively driven by grub screws which are also used to set the seal at the correct working length.

Designs MB0, MD0, & MF0 are balanced, reducing heat and friction at the faces. This prolongs life and allows for higher operating parameters.

Wave Spring Seals

Wave Spring seals are bi-directional and commonly used in lobe pumps working with high viscosity liquids.
Typical industry usage is dairy, brewery and pharmaceutical applications. Compact in design these seals can be utilized in smaller stuffing boxes.

The standard design features positive drive via the grub screws, which are also used to set the seals working length.

The uniform force that a wave spring provides gives consistent axial movement and dynamics.

Design WGD features a crest-to-crest wave spring and reduces the risk of corrosion and fracture as can be experienced with welded wave springs.

Multi Spring Seals

Maximum Operating Limits
Pressure	14 bar  Unbalanced) 20 bar (Balanced)
Speed	15 m/s
Temperature	-40°C to +200°C

Wave Spring Seals

Maximum Operating Limits
Pressure	14 bar  Unbalanced) 20 bar (Balanced)
Speed	15 m/s
Temperature	-40°C to +200°C

Multi Spring Seals

Elastomer Material Availability

Material	Temperature	Recommendations
Ethylene Propylene	-40°C to +140°C	General applications, especially hot water. Must not come into contact with Oils.
Nitrile	-30°C to +120°C	Standard Material. Suitable for medium duty applications. Not recommended for hot water.
Viton®	-30°C to +230°C	Suitable for general chemical applications. Not recommended for hot water.
Other materials available on request.

Wave Spring Seals

Elastomer Material Availability

Material	Temperature	Recommendations
Ethylene Propylene	-40°C to +140°C	General applications, especially hot water. Must not come into contact with Oils.
Nitrile	-30°C to +120°C	Standard Material. Suitable for medium duty applications. Not recommended for hot water.
Viton®	-30°C to +230°C	Suitable for general chemical applications. Not recommended for hot water.
Other materials available on request.

Face Combinations (Stationary)

Carbon	Alumina Ceramic	Silicon Carbide
Not Available	Increased Performance	Not Available
Increased Performance	Recommended For Aggressive Media	Not Available
Not Available	Recommended For Aggressive Media	Recommended For Aggressive Media
Other combinations available on request.

Face Combinations (Rotary)

Carbon	Alumina Ceramic	Silicon Carbide
Not Available	Increased Performance	Not Available
Increased Performance	Recommended For Aggressive Media	Not Available
Not Available	Recommended For Aggressive Media	Recommended For Aggressive Media
Other combinations available on request.