Double Flanged Resilient Seated Butterfly Valve

PRODUCTION CAPABILITY AND CERTIFICATE

FIELD OF APPLICATION

SISCO RBV070 series is design to meet the stringent requirements of wide range of industries worldwide including:

Chemical 

Beverage

Brewing/Wine Making 

Pharmaceutical

Food Processing

Petroleum Refining & Oilfield 

Transportation

Ultrapure Water 

Marine

Pulp & Paper 

Mining 

Power/FGD 

Nuclear Power 

Irrigation

Water & Wastewater Treatment

 Textile

Desalination

DESIGN FEATURES

1.Bi directional bubble tight shut off， zero leakage.

2. Full EPDM cladding design of the seat and disc thoroughly prevent line media from corroding body, body contact face and disc.

3.  Dry shaft feature isolating the line media from the shaft and there- fore standard shaft material can be used.

4.  Smaller operating torque.

5.  Light weight and volume lowering cost and achieving easy installation.

6.   Full bore feature results in higher Cv value.

7.   ISO 5752-1 3 long patten face to face.

GENERAL FEATURES

Body

One piece double flanged body design with middle face to face dimension (ISO5752-13) comparing with double flanged body. All bodies are drilled to be compatible with AWWA C207, ANSI B 1 6.1 , ASME 125/150, DIN PN 10/16, BS，JIS or other international flange standards. Threaded holes can be drilled according to customer preference in case of the   DEAD END SERVICE. Valve mounting top flanges meet ISO 521 1 standards for direct mounting of manual operators and power actuators.

Seat

Vulcanized treatment prevents movement and misplacement of the seat under pressure, reduces shrinkage of the rubber during processing, increases seal surface precision and sea ling property and ensures a lower torque valve. Cladding design of the seat completely isolates the line media from the body and body contact surface, which avoids the corrosion to them, increases ser­vice life.

Disc

High strength discs are first cast, the sealin9 edges are spherically machined then either hand polished or the entire disc is Nylon or Rubber coated to produce a bubble-tight shut off, minimum torque, and longer seat life. The symmetrical disc pr0日le increases CV valves, reduces turbulence and increases Pressure recovery.

Shaft

Alternative to high corrosion resistance shaft materials, RBV070 is equipped with the dry s haft design because of its concentric.

nature and axial sealing design, where standard material shaft is completely isolated from the flowing media.

One shaft pin-less and double shafts pin-less design are available to choose depending on customer 's preference. Precision machining of the disc and the stem connection minimizes hysteresis and produces maximum strength engagements.

 All stem designs incorporate a blow-out proof feature.

Both disc/stem designs inherently provide complete protection from particle entrapment and bacterial decay, protection that is

required for sanitary performance . For superior erosion and abrasion resistance, the one-piece disc/stem is fully encased in either EPDM or BUNA-N.

For double shafts pin-less design, precision double ”D" or ”Square" disc to stem connection drives the disc without  the  need for screws or pins. The close tolerance, double "D” or "Square" connection that drives the valve disc are an exclusive feature of the SISCO valve. Disassembly of the shaft is just a matter of pulling the stem out of the disc.

Blow-out Proof

A retaining ring, installed between the machined stem groove and gland retainer step, provides full retention of the stem in the unlikely event of internal stem failure.

Primary & Secondary SEALS

These seals prevent line media from coming in contact with the

stem or body. Primary Seal is achieved by an interference fit of the r)molded seat flat with the disc hub. Secondary Seal is created be

cause the stem diameter is greater than the diameter of the seat

stem  hole Self-adjusting  triple 0-ring sealing  is a l so applied to give positive sealing in both directions and prevents e×ternal sub- stances from entering the stem bore.

Actuator Mounting

Due to a modular concept of design, all SISCO actuators including Handles, Gear Opera­ tors, Pneumatic and Electric Actuators mount directly to SISCO resilient seated valves. No brackets are required. This a l lows for simple installation in the field, minimizes possible misalignment and reduces overaII height.

STANDARD MATERIALS