The Check Valve Union is designed to seal off well pressure in the event of the wireline parting from the toolstring. The steel ball is forced against the seat by the well pressure preventing flow from below.
The Check Valve Union is manufactured as a one-piece body assembly and is assembled below the Stuffing Box or Grease Injection Head.
The Check Valve Union design has an added advantage in that the internal Check Valve Assembly can be accommodated as an integral part of the Stuffing Box or Grease Injection Head.
This not only reduces the height of the Lubricator Stack but also offers an attractive financial advantage.
The Check Valve Union can be supplied with various sizes Quick Unions, pressure rating up to 20,000psi, for Standard and H2S Service and suit larger wire sizes upon request.
Type ‘O’: Compatible with OTIS Union
Type ‘B’: Compatible with BOWEN Union
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