PME Shanghai is a leading manufacturer of Air-O-Unions, also known as Seal-O-Grip Unions or air inflatable connectors. These carbon steel mud tank unions feature oil-resistant NBR inflatable tubes, perfect for low-pressure fluid lines (up to 150 psi). Available in 4″ to 14″ sizes, our Air-O-Unions provide flexible, leak-proof connections for drilling mud suction, return lines, and manifold systems, offering a reliable alternative to Kemper and WECO Seal-O-Grip products.
PME Air-O-Unions and Seal-O-Grip Union for Mud System Connections
Quick Connection NBR Inflatable Tube

Air-O-Unions & Seal-O-Grip Unions

PME Air-O-Unions (also known as Seal-O-Grip unions or inflatable connectors) are the industry standard for fast, leak-proof connections in drilling mud systems. Engineered with a durable carbon steel body and an oil-resistant NBR inflatable tube, these unions allow for flexible alignment on mud tanks and manifolds.

Available Sizes4″, 6″, 8″, 10″, 12″, 14″
Body MaterialHeavy-duty Carbon Steel
Working PressureMax 150 PSI
Seal MaterialOil & Abrasion Resistant NBR
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Key Operational Applications

Mud Tank Systems

Perfect for quickly linking active and reserve mud tanks, ensuring a secure seal between tank sections and transfer pipelines.

Suction & Return Lines

Reliable performance in suction lines between mud pumps and pits, accommodating minor pipe misalignment during rig-up.

Mud Cleaning Systems

Ideal for connecting shale shakers, degassers, and centrifuges within the primary mud circulation loop.

Technical Advantages

PME Air-O-Unions provide a cost-effective, high-quality alternative to Kemper and WECO Seal-O-Grip models. Key benefits include:

  • Rapid Connect/Disconnect
  • Accommodates Pipe Misalignment
  • Oil-Resistant Sealing Element
  • Low-Pressure Fluid Efficiency
  • Water & Slurry Compatibility
  • Durable Carbon Steel Build

Upgrade Your Mud System: Whether building a new tank battery or replacing existing connectors, PME provides the durability your rig site demands. Contact contact@pmeindustrial.com for technical data and bulk export pricing.

Explore the full range of PME Flow Control Products and oilfield equipment, manufactured in accordance with API standards. From high-pressure flowlines and manifolds to API 7K/16C/16D certified hoses, PME Shanghai provides integrated solutions for global energy sectors.