Advanced Seal Design and
Seal Stack Solutions

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Material & Design Solutions supplies quality thermoplastic, elastomeric, and metal components for the oil & gas, fluid handling, and semiconductor markets, providing our customers with the advanced sealing solutions they need for various critical service applications. Our advanced seal stack solutions include:

  • Custom Seal Assemblies 
  • Vee Stacks using High-Performance Materials 
  • T-Seals (Petroz, FKM, AFLAS, HNBR)
  • Specialty O-Rings
  • Spring Energized Seals
close-up of beige and white seal stack

Seal Stacks for
Critical Applications

Our seals can be found in some of the harshest conditions in the world, servicing critical applications such as:

  • Drilling Tools
  • Wireline
  • Casing Equipment
  • Intelligent Completions
  • Artificial Lift
  • Subsea
  • Completion
  • Subsurface Safety Valves
  • Subsurface Flow Controls
  • Isolation Barrier Valves
  • Liner Hangers
  • Packers
  • Frac/Toe Sleeves
  • Multilaterals
  • Sand Control

Polymer-Based Sealing Components

At MDS, we offer a variety of polymer-based sealing components designed to withstand critical situations in life-or-death environments. We offer polymer-based sealing components such as:

PETROZ

  • FFKM Perfluoroelastomer
  • Low Compression Set
  • RGD Resistant 

AFLAS

  • Compounds Based on 100H Polymer

FKM

  • Fluoroelastomer
  • RGD Resistant

PEEK

  • All Grades and Unique Compounds Developed by MDS

PPS

  • All Grades Commonly Used in Oil & Gas Applications

PTFE

  • All Grades

HNBR

  • Hydrogenated Nitrile 
    RGD Resistant

Custom Seal Solutions

SES is orientated in the middle of the system to prevent damage (versus being on the ends) while CF PEEK end rings help reduce extrusion due to HP. Excellent for stab-in requirement.

custom seal system drawing

Cross port applications: bonded center rubber to PEEK V-rings prevents rubber getting snipped from the ports; velocity rings protect the seals from high fluid flow.

spring energized seal drawing

V-Ring Bidirectional Seal System

Made of rubber, PTFE, or PEEK (depending on requirements).

v-ring bidirectional seal drawing

V-Ring Seal System with O-Ring

Bidirectional, low pressure sealing where the O-ring is protected by the V-ring to eliminate gaps.

  • Advantages of V-Ring Seal Systems with O-Rings
  • Combination of PEEK, PTFE, and elastomeric V-rings eliminates the disadvantages of compression set due to thermal cycling
  • Rubber V-rings have a higher sealing force vs O-rings due to geometry
  • Disadvantages of V-Ring Seal Systems with O-Rings
  • Rubber V-rings require tooling
  • 2-piece gland
v-ring seal system with o-ring seal drawing

V-Ring Seal System (Non-Elastomeric Spring Energized)

Bidirectional, capable of large delta T, chemically inert, spring energized primary seals keep the vee rings energized.

  • Advantages of V-Ring Seal Systems (Non-Elastomeric Spring Energized)
  • Less friction
  • Spring energizer
  • Non-elastomeric (no tooling)
  • No chemical compatibility issues 
  • Disadvantages of V-Ring Seal Systems (Non-Elastomeric Spring Energized)
  • 8-16 RMS
  • 2-piece gland
  • More expensive due to SES and adding components for hat rings 
v-ring non-elastomeric seal drawing