Weco wing unions are the most complete line of standard and sour gas pipe connectors available, ranging in size from 1 - to 12 - inches with cold working pressures to 20,000 psi. All Weco unions are color coded for quick identification. Materials meet ASTM and AISI standards.

Weco wing union seals vary according to pressure and application. All wing unions provide positive, pressure-tight sealing.

For low-pressure services (1,000 to 2,000 psi), the spherical surface of the male sub and the conical surface of the female sub form a metal-to-metal seal. This ball-and-cone seal remains leak-proof even when one surface is slightly pitted or misaligned.

Most medium-pressure models (2,000 to 4,000 psi) supplement the metal-to-metal seal with a resilient O-ring in the male sub. Weco high-pressure unions (6,000 to 20,000 psi) feature a replaceable, lip-type seal ring in the female sub. This primary seal protects the secondary metal-to-metal seal from abrasion and corrosion while minimizing flow turbulence.

The Weco nonpressure-thread seal option is designed for abrasive, high-pressure applications where welded connections are undesirable.

Three-lug nuts and rugged self-locking ACME threads provide fast make-up and break-out regardless of position or space restrictions. No special tools are required.

Weco standard service wing unions are color coded for quick identification. Sour gas wing unions are stamped "sour gas" using low-stress dot stamping and painted with a green, zinc-chromate colored primer unique to sour gas equipment.

All Weco parts of the same size, pressure rating, and figure number are interchangeable. This feature makes it easy to match male and female subs that are frequently made-up and broken-out. And, because FMC Technologies makes every Weco wing union to the same rigid standards, you get a quick and positive seal every time.

Weco unions are produced using the finest raw materials, tooling procedures, and heat-treating techniques available. Each union is carefully inspected to assure long, dependable service in the most extreme conditions.

Weco wing unions, like all pressure containing equipment, require special care and use. See section on warnings and safety Instructions.

Features and Benefits

• Positive sealing designs
• Fast make-up and break-out
• Interchangable parts
• Choice of end connections
• Nonpressure seal connection