PSHP SEALS FOR VERY HIGH PRESSURE

In very high pressure applications it is often difficult to identify the best performing seal, as the risk of gasket extrusion is high and to reduce that it is necessary to use specific materials and geometries.

Challenge

One of our customers decided to diversify the product range, providing a wide range of very high pressure pumps and asked us to develop a new solution, not just a simple seal, but a sealing system optimizing with respect to his own specifications features.

Solution

Firstly ATP technical team analyzed the operating conditions of the application.

TECHNICAL DATA

• Media: water
• Movement: alternative
• Seal diameter: 14 mm
• Speed: 1.6 m / s on the sliding area
• Pressure: max. 1500 bar
• Temperature: -10 ° c ÷ + 50 ° c

The study of the application led our designers to the use the PSHP profile for the primary seals due to its very high pressure. This profile it is characterized by high resistance to wear and extrusion. This particular profile, specific for very high pressures, is composed of three components in different materials; in these specific conditions we have used for example: SINTEK CER P / SINTEK D55 / SINTEK NBR.

The sealing system also consists of a secondary seal, a the self-adaptive one,  ATP patent, in SINTEK H-TPU (PSFA Profile) for the low pressure area.

To complete the system we chose the static seals type BLT in SINTEK D55,  whose geometry – designed by ATP – is specific for resistance to extrusion in cases of high pressure or large gaps between the metal parts.

For the less demanding applications of the range we chose a simpler solution, that works with PTFE and SINTEK CER P packs on the primary seal and, in some cases, lip solutions with specific sizing in SINTEK HTPU or SINTEK D55.

Testimony

An innovative choice of the sealing system for high pressures, combined with a careful design of the metal parts and seats (tolerances, play, roughness and surface treatments) has allowed us to achieve better results in comparizon with the ones previously seen on the market.

Consult our general catalog for the recommended materials depending on the operating conditions.