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BST's WFM-14R pilot valve is used for intermittent gas lift applications.  This valve incorporates two sections within the single housing:  a pilot section and a power section.  A strong compression spring provides the temperature independent force necessary to maintain the pilot section in a normally closed position.  A compression spring maintains the power section in a normally closed position.  The power section is dependent on the pilot section to allow injection gas pressure to reach the power section.  A reverse flow check is incorporated as an integral part of the WFM-14R.

The WFM-14R valve has the ability to rapidly inject a large volume of injection gas for intermittent flow.  The injection gas first enters the pilot section and compresses the bellows, which lifts the stem tip off the seat and directs pressure to the power section.  This opens the power section and injects gas through the large ported power section.  When the annular injection pressure draws down and closes the small ported pilot section, the power spring then closes the master port.

This valve is used for unloading and intermittent gas lift operation, and is available with a spread range of 17% to 50% with various sized pilot stems and seats.

The WFM-14R requires BST's WFM or WFMK top latch for use in all standard side pocket gas lift mandrels with a 1" pocket.


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Copyright 2013 BST Lift Systems Inc.
Last modified: November 14, 2013

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