Delivering Fluid Sealing Solutions Since 1972

Agitators and Mixer Seals

UK Fluid Sealing Solutions For Vessels, Agitators and Mixers

M Barnwell Services is one of the UK’s largest independent stockist and distributor of Agitator and Mixer Seals. As the industry experts we provide a complete sealing solution and our experienced team will guide all aspects of production, including prototyping, testing, and final part manufacture. We understand that Agitators and Mixers are an important application within the processing industry and that on occasions they can suffer from seal failure causing product leakage. Ultimately this will then lead to increased costs from product contamination.

To help reduce downtime M Barnwell Services provide the full range of PS Seal®s – the perfect cost-effective Agitator and Mixer Seal.

Garlock’s PS Seal® is a high-performance dynamic Lip Seal for rotating equipment used in Pharmaceutical, Food and Beverage and other processing applications. A reliable seal for rotating shafts at high circumferential speed, high pressure and extreme temperatures.

As a high performance seal they are manufactured with a sealing lip made of a modified PTFE or Garlock’s specialist GYLON® material.

Mixer Seals

Agitator and Mixer Seals Benefits

  • Excellent chemical resistance
  • Wear resistant and low friction
  • SIP/CIP compatible
  • Useable under high pressure and in extreme vacuum
  • Very suitable for high circumferential speed
  • Temperature resistant from -90 °C up to +260 °C
  • EN 1935/2004 certificate
  • Good dry running capability

PS-SEAL®s are usable in many different applications and can also be an alternative to mechanical seals and braided / compression / valve stem / gland packings. For more information contact the team.

PS-SEAL® Non-Standard – Different Lip Materials

GYLON® Black
An excellent PTFE/graphite based material suitable for lubricated applications. Not made for dry running and not suitable for food & pharma applications.
Garlock’s top solution in the food & pharmaceutical sectors having important certificates EC 1935; USP Class VI; FDA etc. Also ideal for larger shaft deflections on mixers and agitators. Excellent in dry running and with good gas tightness. However, abrasive media may cause problems for the PTFE/microspheres material.
GYLON® Brown-White
A cleverly combined PTFE material for abrasive applications in the food industry. The brown side of the lip contains abrasive-resistant additives, the white side heat-dissipating additives. This gives longer running hours with less down-time, and improves the operating process. Of course with FDA and EC 1935 conformity.
GYLON® White
Due to the white color a popular material in the food & pharmaceutical industries (with important certificates EC 1935, USP Class VI, FDA etc.), but also in the production of paints. The lip basis is a PTFE with barium sulfate, giving excellent gas tightness. The suitability for dry running is good, but the circumferential speed should be low, because the friction temperature can rise quickly.
Material F Beige
Not a GYLON®, but a precisely designed material based on PTFE Ekonol. Specially designed for dry running, it shows its strengths there. High speeds can be run with low frictional heat. It is well suited for CIP and SIP processes in the food industry. Its excellent gas tightness in vacuum applications is also highly appreciated. However, in order to benefit from its advantages, it requires precise shaft concentricity.
Material MS Grey
A material developed with the hardest glass that scores excellently with abrasive media even without a GYLON® matrix. Optimal for dry running in the environment of abrasive powders and dusts. It also offers high pressure resistance with low wear. It is often combined in tandem with the other lip materials to increase its performance with low-viscosity media or gases.

PS-SEAL® Non-Standard – Different Lip Configurations

Reverse lip
A single lip points out of the housing towards the media.

The success of this design is astounding:

The dead space is reduced by almost 80%, which has an extremely positive effect on cleaning and significantly reduces possible contamination. A clear plus in daily use.
Back to back
Two lips seal equally on both sides.

Safe separation of two media is also possible – and this with only one seal. Where two shaft seals would otherwise have to be used back to back, this task is accomplished by a PS-SEAL® Non-Standard in back-to-back design – and with only the smallest installation width.
Single lip with dust lip
The seal lip sits in the housing as standard, and is supplemented by a dust lip facing towards the dry side.

If the working environment is contaminated with dust, the PS-SEAL® Non-Standard can also be equipped with a dust lip. Here, the suitability of the PS-SEAL® lips for dry running is particularly exploited, thus increasing the performance of the seal.
Two seal lips towards the media.

If longer service life is required or if even greater plant safety is desired, a PS-SEAL® Non-Standard Tandem is a good choice. With the smallest installation width, two seal lips are now available instead of just one.

M Barnwell Services is proud to be Garlock’s UK Strategic Partner, stocking and supplying their sealing portfolio. The range of Garlock seals deliver solutions that improve plant productivity, reduce costs, and comply with increasingly stringent environmental regulations.

If you would like more information about our range of Agitator and Mixer Seals contact a member of the team.