Valve design API609, AWWA C504/516, BS EN593, ASME B16.34, MSS SP-67/68
Wall thickness ASME B16.34, AWWA C504/516
Face to Face
API609, AWWA C504/516, ASME B16.10, ISO 5752
Test &
API598, AWWA C504/516, ASME B16.34, MSS SP-61
Flanged End ASME B16.5/B16.47, AWWA C207
Main materials Carbon steel, Stainless Steel, Aluminum bronz, Cast iron, Ductile iron,
Body style Flange, Wafer, Lug

This is the most common and simple design. The shaft is concentric to the disc. It is normally resilient seated valve. Rotating the handle turns the plate either parallel or perpendicular to the flow of water, shutting off the flow.
Valve design BS EN593, API 609 Cat’ A, MSS SP67
Wall thickness ASME B16.34 Class 150
Flanged End ASME B16.1, ASME B16.5, ASME B16.47,
AWWA C207D PN6, 10, 16, JIS 5K, 10K, 16K
Test & Inspection API 598
Body style Wafer, Lug, Flange
Face to Face dimension API 609 Cat’ A, ISO 5752 Ser’20
Main Materials Cast Iron, Ductile Iron, Carbon Steel,
Aluminium Bronze. Stainless Steel
FEATURES   ------   1. Disc and seats

Easy replaceable seat without any special tools.

The valve has an O-ring attached to the flange surface, so a separate gasket is not required.

Disc Precision profile provides bubble-tight shut-off, assures minimum torque and longer seat life.
ISO 5211 mounting flange accommodates direct mounting of all types of actuators.
FEATURES   ------   2. Stem
Blow-out Proof Stem The upper stem is fully retained by the retainer plate under pressure in unlikely event of primary seal fail.
O-ring Prevents leakage from stem.
Bush Stem bushing reduces valve torque and prevents stem corrosion.

The double eccentric design of the valve results in minimal wear of the disc seal. This is because the disc swings open and closed like a door, which relieves stress on the seal after just a few degrees of opening. Additionally, the disc and seat are designed to require the lowest possible operating torque for both opening and closing directions, even when there is full differential pressure present.
Valve design API 609 Cat’ B, MSS SP68
Wall thickness ASME B16.34 Class 150/300
Face to Face dimension API 609 Cat’ B, MSS SP68
Flanged End ASME B16.1, ASME B16.5, ASME B16.47, PN6, 10, 16, 20 JIS 5K, 10K, 16K, 20K
Test & Inspection API 598
Main Materials Carbon Steel, Aluminium Bronze. Stainless Steel, Duplex
Body style Wafer, Lug, Flange
FEATURES   ------   1. Double eccentric design

The double eccentric butterfly valve has a disc that is mounted off-center from the axis of the valve body, which reduces interference between the disc and the valve seat. The valve seat and seal ring are machined to form a cone with an axis that is aligned with the valve. This configuration helps to minimize any interference or friction between the disc and the valve seat, allowing the valve to operate smoothly and efficiently.

These are two offset measurements :

E1 is the distance from the center of the seat,

and E2 is the distance from the center of the valve.

FEATURES   ------   2. Seat design options
Flexible PTFE Seat PTFE seat having a flexi-lip provides bubble tight shut off in both the directions.
Suits to wide range of applications.
Maximum working Temperature 200°C
Flexible Rubber Seat Rubber seats are available in EPDM, NBR and Viton materials.
Rigid seats allow a clean flow passage & prevents fluid deposition within the seat.
Flexible Metal Seat Most suitable for high consistency fluids having suspended hard particles, for erosive services, for high temperature services from 200°C to 550°C.
Fire safe design Fire safe valve is equipped with Teflon seat and metal seat at the same time. It is designed by that before occurring a fire, Teflon seat works for bubble tight sealing and when a fire occurs and Teflon seat is burnedout, then the metal seat works in order to keep the sealing.

The CEPHAS PIPELINES butterfly valve is designed for use in waterworks systems, as well as in processand power industries as a main or end pipe valve. It is a double flanged double eccentric type valve, which can be accommodated to various flange standards (JIS, BS, DIN, ASME).
Valve design AWWA C504
Wall thickness AWWA C504
Face to Face dimension AWWA C504, C516
Flanged End ASME B16.1, ASME B16.5, AWWA C207, PN6, 10, 16, 20
Test & Inspection API 598
Main Materials Cast Iron, Ductile Iron, Carbon Steel, Aluminiu Bronze, Stainless Steel
Body style Wafer, Lug, Flange

The CEPHAS PIPE LINE triple offset butterfly valve are designed in accordance with API609 with features of bi-directional, lightweight, cost effective and low torque. For triple offset butterfly valves,the working temperature range is -196°C ~ 500°C, and there are variousmaterials for choose. Triple offset butterfly valve can be used not only on-off but also regulating the flow, thus it is replacing traditional gate, globe, ball valve.
Valve design API 609 Cat' B, MSS SP68
Wall thickness ASME B16.34 Class 150/300/600/900/1500
Face to Face dimension API 609 Cat' B, MSS SP68
Flanged End ASME B16.1, ASME B16.5, ASME B16.47, PN6, 10, 16, 20
Test & Inspection API 598
Main Materials Carbon Steel, Aluminiu Bronze, Stainless Steel, Duplex
Body style Lug, Flange
FEATURES   ------   1. Triple offset Geometry
  • Offset 1 :
  • The shaft centerline is offset from the pipe and valve which provides interference free opening and closing of the valve.
  • Offset 2 :
  • The shaft is offset behind the seat axis to allow compleat sealing contact around the entire seat.
  • Offset 3 :
  • The seat cone axis is offset from the shaft to eliminate friction during closing and to achieve uniform compressive sealing around the entire seat.
FEATURES   ------   2. The laminated seal

The laminated seal flexes & get energized in the direction of seal all over its entire circumference.

The resiliency of the disc seal allows valve body and disc to expand or contract without producing jamming effect under the fluctuating temperature range.

FEATURES   ------   3. Bi-directional bubble-tight sealing

Triple offset Butterfly valves are torque seated valve where bubble tight sealing is achieved when the laminar seal flexes and generates a compressive force all around the hard faced body seat.

Emergency valve can control the flow direction in order to prevent the breakge of pipes by the reverse flow due to the sudden rising of the flow speed. When ordered by a control device. The closing speed of he valve disc can be adjusted.
Size DN250(10") ~ DN3000(120")
Pressure ASME CLASS 150,300, JIS 10K, 20K
Temperature -50°C ~ 600°C
Seat Metal seated / Rubber Lining
Material A536, A216, A351, B148
Operation Hyd' cylinder

Cryogenic valves are specialized valves designed to regulate or control the flow of cryogenic fluids, which are liquids with extremely low temperatures, typically below -150°C (-238°F). These valves are specifically engineered to function in environments that are subject to extreme cold temperatures, often found in industrial applications such as liquefied natural gas (LNG) and industrial gas storage and transportation.


  • 1. Valve design as per BS6364.
  • 2. Extended stem and bonnet to position stem packing above the cryogenic fluid and proving a column of warmer vapor that insulates the stem seal for low temp.
  • 3. Anti blow -out stem.
  • 4. Fire safe design.


  • 1. All components are cryogenic (-196°C) treatment prior to assembling.
  • 2. Valves to be cryogenically tested are first hydrostatically tested using water to prove the integrity of the body casting, seals and seat. They are then fully cleaned and dried ready for cryogenic tests.
  • 3. Valve soaked in liquid nitrogen (-196°C) and tested with pure helium gas to detected the seat leakage.

Minimum Working Temperature for Body Material

Forging Casting
Material Min. Temp. Material Min. Temp.
A350 - LF2 -46°C A352 - LCB, LCC -46°C
A350 - LF5 -59°C A352 - LC1 -59°C
A350 - LF9 -73°C A352 - LC2 -73°C
A350 - LF3 -101°C A352 - LC3 -101°C
A182 - F304 -254°C A351 - CF8 -254°C
A182 - F316 -254°C A351 - CF8M -254°C
A182 - F304 -254°C A351 - CF3 -254°C
A182 - F316L -254°C A351 - CF3M -254°C
Size 3" ~ 48"
Pressure ASME CLASS 150 ~ 1500
Temperature -196°C, -46°C
Seat Metal seated / soft seated
Material CS, SS, others upon customer's request
Operation Manual, Motor, Pneumatic