Gas Oil API 6A Slab Gate ValveTYPICAL
ADVANTAGES•Negligible Pressure Drop•Self - Relieving•Double Block
and Bleed performances•Equalized Bore (as
required/operated)•Possibility of reverse acting andequalized bore
for fail closed operation•Double seal upstream by piston effect,
down-stream with floating obturator•Superior Seal Per formances
(Bubble Tight)•Suitable for all types of fluids (including abrasive
fluids)•Suitable for ESDV/BDV applications and Pig Traps•Extremely
flexible actuation with or without stem ejection assistance•Robust
Construction•Full In-Line maintainability•Fire Safe
constructionStem/Stem sealThe stem is designed with a threaded-in T
bar allowing relative motions of the gate under line pressure. The
stem seal uses braided graphite gaskets ensure sealing integrity.
Stem sealant injection system is achieved through a por t located
on the bonnet. In case of leakage through the stem seal it is
possible to inject the sealant through the stem packing release
valve.SeatSeats are ENP coated and are provided with thermoplastic
soft inser t on their face.A "double face seal" effect is obtained
due to metallic contact between the seat and the gate, thus
increasing the reliability of the valve. Metal-to-metal seating is
available for abrasive ser vice. In such case gate and seat faces
are coated with HVOF Tungsten Carbide coating.Fire-safe
designFlanged End Expanding Gate Valves is available
in the API 6FA fire-tested design. Fire-tests have been witnessed
and cer tified by independent authorities. RAYS Fire tested gate
valves offer the highest resistance against fire. The body seal is
a spiral wound graphite/AISI 316 gasket and the stem seal is a
die-formed/braided graphite packing. The stem incorporates the back
seat feature to allow stem seal re-packing with valve in ser vice.
Fire-tests cer tification is available and can be provided upon
request.Fully piggableFlanged
End Expanding Gate Valves are designed to be Fully
Piggable. Pigs and scrapers can be run through the valve without
any damage to the internal structure of the valve.Easy
maintenanceFlanged End Expanding Gate Valves design
minimizes and eases the maintenance allowing for the ser vice
operations to be done without the removal of the valve from the
line.Double Block and BleedDouble block and bleed capability and
automatic relief of excess body pressure are standard features of
RAYS Through Conduit Slab Gate Valves. With the valve fully closed
and pressure on both sides, it is possible to bleed the pressure
from the body cavity to check seat seal integrity and to achieve
double isolation between the two sides and avoid any risk of
product contaminationSingle piston effect seatsSeats rings are
floating type and are energized against the gate by means of
helical springs. The initial seating is enough to assure sealing
between gate and upstream seat when the line pressure is applied.
The gate allows axial movement and the upstream force derived from
line pressure force the gate against the downstream seat creating a
double, bubble tight barrier.Additional features (Available on
request)• Metal seated/Tungsten Carbide coating for abrasive
fluids• Stem extension for buried ser vice/high temperature ser
vice• Inconel 625 cladding of the sealing sur faces for corrosive
ser vice• CRA alloys for ver y corrosive media (Duplex,UNS
S31254,UNS S34565)• Seat Sealant Injection system for Emergency
Sealing• Transition Pipe Pups welded to the valve ends• Position
indicator• Actuation (Electric, Pneumatic and Hydraulic
actuators)Self relieving featuresThe single piston design with the
possibility of both seats and gate to float, permits the automatic
release of any overpressure in the body cavity.Consequently, the
seat rings are "self-relieving".SIZE RANGE: 1-13/16″~7-1/16″
WORKING PRESSURE: 2000~15000 PSI DESIGN STANDARDS: API 6A MATERIAL
CLASS: AA~HH END CONNECTION: RTJ FLANGE OR THREARED APPLICATION:
OIL FIELD SLAB GATE VALVES The Slab Gate Valves features a
non-rising stem with a slab gate, Full-Bore Thru-Conduit Design,
Floating Slab Gate and Seats, floating seat ring body bushing
design to provide safe dependable service. No special tools are
needed to change gate and seat assembly. The stem pin protects the
stem and internal parts from failure by shearing if the handwheel
is over torque. One-piece gate helps to prevent line sediment from
entering the body cavity and prevents pressure locks when the up
stream pressure drops. A wide range of body and trim materials to
meet various operating conditions. Flanged End 3,000 psi Working
Pressure Size Bore(mm)Face to Face(mm)Total
Height(mm)Weight(Kg)2-1/16″52.4371530803-1/8″79.44355701254-1/16″103.251163523010,000
psi Working Pressure Size Bore(mm)Face to Face(mm)Total
Height(mm)Weight(Kg)1-13/16″46.0464530902-1/16″52.45215351202-9/16″65.15655701403-1/16″79.46195952104-1/16″103.26706853607-1/16″179.48899551720Threaded
End 3,000 psi Working Pressure Size Bore(mm)Face to
Face(mm)Total Height(mm)Weight(
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