Detail

TYPICAL ADVANTAGES

•Negligible Pressure Drop
•Self - Relieving
•Double Block and Bleed performances
•Equalized Bore (as required/operated)
•Possibility of reverse acting and
equalized 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 construction

Stem/Stem seal
       The 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.

Seat
       Seats 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 design
       Flanged 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 piggable
       Flanged 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 maintenance
       Flanged 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 Bleed
       Double 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 contamination

Single piston effect seats
       Seats 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 features
       The 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.

Quality and inspection:
       Regular check on production line at each working procedure, and one special inspector inspecting the goods in random during the period time of production.regular performance check on finished goods.        
Production step:
       1.The raw materials are cast or forged and processed into semi-finished products.
       2.Processing the semi-products in works shop
       3.Assembling the goods
       4.Testing the sealing in pressure and checking quality of the goods
       5.Package
       6.Delivery the goods on time
Package:
        1.The pakage standard:inside PVC bag and small box and standard export carton
        2.If you have any special requirements pakage,we can pakage as per your artworks.
Primary Competitive Advantages:
       1) We have several years of experience in manufacturing various types of valves professionally.
       2) Products are of good quality, with reasonable prices.
       3) Our style:Promise must be kept and action must be prompt and fruitful.

       Our business idea:All for customers and everything from innovation.