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WECO Union 50

Product name: Wings union 50 (WECO type)
Brand name: Ocelot
Recommended service :
Suction service and very low pressure.
Main characteristics :
Max pressure: 500 PSI STD & H2S service
Working T: -20°F / 250°F
Thread: ACME
End connection: NPT Thread
Sealing system: Metal to metal + o-ring on the male side
Material: A105 / A350 LF2 Mod 

Product Introduce

Wings union 50 (WECO type) Feature:

They are the pressure containing parts of the assembly that provide a metal-to-metal primary seal.

Subs are manufactured per different assembly modes:

    Buttweld assembly

    NPT threaded assembly

    PST threaded assembly

    Sub profiles are also machined/forged as an integral part of a piping element.

Nut :

This is a forged part of the assembly that allows the connection of the two subs through a specific Acme or Iso thread.


Seal Element :

The seal element is an elastomer component which acts as a secondary seal to protect metal-to-metal seal against corrosion.

Depending on the union figure it can be a lip type ”Seal Ring” or an ”O-Ring”

Different materials are available to suit fluid service (Buna for Standard service or FKM for H2S service).

Product Parameter

Wing Union 50 Technical Parameters:

General dimension FIG. 50 - NPT Thread

Part N°

Nominal pipe size (inch)

A (mm)

B (mm)

øOD (mm)

Weight (kg)

Union 50 - 4" NPT






Union 50 - 5" NPT






All specifications are given as an indication, they may be modified in the interest of our customers.

Note: the operating temperature depends on the type of elastomer used.

Application Area

Wing Union 50 Application:

Wings union 50 is mainly used for mine hydraulic support, oil field development, suitable for engineering construction, lifting and transportation, metallurgy forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools and various industrial departments In the mechanized and automated hydraulic system.


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