The HPHT sealing stack that is reliable, easy to install, and easy on the bottom line.



The HPT Stack is a three-piece, HPHT, doubling acting piston or rod seal. Commonly used as a multi-vee seal stack replacement, such as the ATR or VTR sealing stacks. The HPT stack offers superior sealing performance and has good adaptation possibilities for diverse temperatures and media by the selection of suitable materials. The seal stack can hold 15,000 psi at 400°F (204°C) with passing ports at shifting pressures of 1,500 psi.


• Significant reduction in cost when compared with VTR/ATR, as well as other multi-component sealing Stacks
• 3-piece design with split guiding elements enables easy installation.
• Allows for reduced groove width
• Proven to operate at 15,000 psi at 392°F (200°C)
• Large element “lead-in” reduces the risk of damage while traversing ports.
• Pre-load can be modified to suit customer requirements.

Technical Data

Temperature Range: -40°C to 232°C (-38.2°F to 450°F)
Max Pressure: 20000 PSI
Max Surface Speed: 2.3 fps (0.7m/s)

Design Guide

HPT Stack Design Guide

Quality You Can Rely On


All parts are measured on our Zeiss O-Machine and or Keyence CMM, which utilize optical and contact measurement technology in a comprehensive analysis. The O-Machine includes multi-sensor coordinate measuring, white light sensors for non-contact assessments and extremely accurate 3D scanners.

We follow AQL 2.5 levels 1 and 2 sample size quantities, and all molded parts are manufactured to RMA A2 tolerances. 

What comes with your orders:

  • Every order is sent with either a paper or digital QC document that includes ID, OD, C/S, Height, angles, and any other dimensions your organization feels critical. 


Our rubber and plastic materials supply is diversified amongst the top compounders in North America. Each polymer has been qualified to meet typical exploration and production well conditions, including mechanical, tribological, thermal, and specific immersive properties.

What comes with your orders:

  • Every order comes with an MTR that includes a batch number, cure dates, and a set of mechanical properties.

Available Materials

Let’s discuss your project

You’ve made it this far, but we know there is still more to discuss. Click on the book a meeting button below and we can discuss over a phone or video call.

Book a Meeting

Related Products