PRODUCTS INTRODUCTION
The GEOTHERMAL EXPANDING GATE VALVE is an unidirectional manual operated valve with
non-rising or rising stem and parallel expanding gate and segment design. The parallel expanding
gate design provides a tight mechanical seal which is normally unaffected by pressure fluctuations
or variations. The gate assembly uses an angular gate face which is collapsed during travel. When
closed, a stop causes any further downward travel to force the faces of the gate assembly outward
to effect a positive line flow seal. When opened, a stop causes any further upward travel to force
bottom faces to expand and seal against the seats to isolate flow from the valve body cavity.
The stem is sealed by reinforced graphite packing and injectable packing. In an emergency,
injecting injectable packing into packing box would affect a temporary seal while the valve is under
pressure.
The expanding valve is designed, manufactured and tested in accordance with API Spec. 6A unless
otherwise specified.
Steel reinforced
graphite stem
packing to provide
excellent resistance
to chemicals and
corrosive elements
Shrink Fit for Seat
and Body to create
a metal to metal
seal
Stellite hard-
faced gate and
seat
Upper and lower
roller thrust bearings
are isolated from
well fluid, minimizing
torque
FEATURES:
‒Nominal Size 2-1/16”, 3-1/8”
‒Work Pressure 2000-5000psi
‒Metal to Metal Seal (Gate-to-Seat & Seat-to-Body)
‒Steel Reinforced Graphite Packing and Injectable Packing
‒High Temperature up to 650˚F (Class Y)
‒Non-rising Stem with Handwheel Operation
‒Option of Cast or Forged Body
‒Expanding Wedge Gate and Seats Design
‒Flange Connection refer to requirement of API 6A
