Floating Seat Bi-directional Seal Butterfly Valve Series 4000 Catalogue

The floating seat bi-directional seal triple offset valves valve design is recommended for industrial applications requiring reliable zero-leakage, bi-directional shut-off in harsh conditions of critical processes, steam isolation, and temperature extremes; especially when use of soft-seated materials in valves is limited.

Compared to ball valves, the Floating Seat Bi-directional Seal Triple Offset Valves is an affordable solution, particularly in larger diameter installations, that requires less structural support to ensure bubble tight shut-off. The result is a virtual zero leakage shut-off even in highair pressure, high-temperature, bidirectional pressure applications. Due to their quarter-turn movement for opening and closing, the valves are easy to automate and they can fulfill a quick closing time, which is often required in safety applications.

Optimized Seat Angle:

An innovative seat angle design and Stellite® hard-faced valve body seat deliver a longer seal life and improved abrasion resistance, even after extensive cycling. Designed to eliminate wedging or binding of the disc, and lower the operating torque, the floating seat bi-directional seal triple offset valves can REDUCE TOTAL COST OF OWNERSHIP BY UP TO 50%.*

Unique Float Seat:

Unlike position-seated ball, butterfly or plug valves, the Unique Float Seated bidirectional seal triple offset butterfly valve self-adjusts to evenly distribute seal compression. A floating seat and wide seal ring supporting face yield a BETTER SEAL to eliminate binding and to enhance performance.

Metal-to-Metal Sealing:

The precision machined metal seat and seal ring deliver reliable and bi-directional shutoff in high-temperature, highpressure and severe service applications among others. The right-angle conical seat design facilitates an almost FRICTION-LESS IN-LINE SEALING.

Laminated Sealing

Stainless steel and graphite multilevel sealing to ensure the valve ZERO LEAKAGE IN HIGH AIR PRESSURE APPLICATION.

Innovative Shaft Seal Design:

Permits superior FUGITIVE EMISSIONS CONTROL (ISO 15848, Class AH) under recurrent thermal cycling, and REDUCES POTENTIAL DOWN TIME.

What is Floating Seat?

Positive Seal: sealing ring engage to the Seat.

Reverse seal: seat engage to the sealing ring after microscopic displacement.

Materials of Construction

• Standard: A216 WCB, A351 CF8M

• Special (upon request): Duplex, Superduplex, LCC/LCB, WC6, CF3M, Monel®, Inconel®, Hastelloy®, Alloy 20

Size Range

• 4” up to 64”, in a single piece cast body

Pressure Ratings

• ASME Class 150Lb, Class 300Lb, Class 600Lb

DN (mm)	NPS (inch)		Pressure
Class150	Class300	Class600
100	4	•	•	•
150	6	•	•	•
200	8	•	•	•
250	10	•	•	•
300	12	•	•	•
350	14	•	•	•
400	16	•	•	•
450	28	•	•	•
500	20	•	•	•
600	24	•	•	•
700	28	•	•	•
800	32	•	•	•
1000	40	•	•
1200	48	•	•
1400	56	•
1600	64	•

Temperature Range

• -140℉ up to 1022℉; -60℃ up to 550℃

• Up to 1200℉ (649℃) possible with Shaft extension

Body Configurations

• Lug

• Double Flanged

• Wafer

• Buttweld

Compliance

• API 609 and ASME B16.34 valve design standard

• Zero leakage as per API 598

• API 607, 6th edition: Fire Tested

• EPA Method 21 (Fugitive Emissions Compliance)

• ISO 15848, Class BH, level C03 is our standard offering. Class AH, level C02 is an optional offering

• Quality certification as per ISO 9001

Test Pressure

• Shell Test Pressure: Nominal Pressure*1.5

• Positive Test Pressure: Nominal Pressure *1.1

• Reverse Test Pressure: Nominal Pressure *1.0

• Positive and Reverse Air test Pressure: 0.6Mpa

A floating seat bi-directional seal triple eccentric or triple offset butterfly valves should be used when the application requires bidirectional bubble tight shut-off but does not allow the use of a rubber-lined butterfly valve due to low/high temperatures and high pressure.

Sealing Ring Detail

■ Disc Seal is Multi-level seal. When seal wear, The seal can be repaired by tight the bolts of disc to extrude the sealing ring.

■ Disc sealing ring is forged metal ring. When fully opening, the scour of medium at high speed will not damage the valve, which prolongs the working life.

Other Design Detail

■ Dynamic seal structure makes long-term seal of packing to extend the maintenance-free period.

■ Fish scale combination packing system，Which ensures Valve Maximum leakage rate ≤20ppm.

■ Stem blow-out proof according to API609

■ Actuator connection platform according to ISO5211.

A premium quality valve that minimizes your cost of ownership

You would not usually associate a premium product with cost savings. however, the reality is quite different with floating seat bi-directional seal triple offset butterfly valves.

In fact, our customers regularly replace existing ball, gate and globe valves achieving substantial reduction of space and weight, while benefitting immediately from lower installation costs.

Triple offset valves have been used extensively in all applications where positive isolation is required. The quarter turn design and extremely low running torque also allow for accurate flow and pressure control. With our valves true isolation and control capabilities can be combined in a single product against the usual need for two distinct valves. In addition, low torque also means low cost of actuation.

So what happens when you install and start operating the valve? floating seat bi-directional seal triple offset valve is designed to be virtually maintenance free and does not require planned maintenance in most applications, providing extra cost savings across its lifecycle.

SAFELY REPLACE YOUR EXISTING VALVES WITH FLOATING SEAT BI-DIRECTIONAL SEAL TRIPLE OFFSET BUTTERFLY VALVE.

Replacing an existing valve can be a necessity but also a strategic choice. floating seat bi-directional seal triple offset valve’s bi-directional zero leakage and inherently fire safe design allows our customers to easily replace gate, ball and globe valves and, with our long face-to-face valves (designed in accordance to ASME B16.10), this operation can be carried out without the need of any piping modification.

Using valves can also contribute to reducing systemic failures thereby improving the overall Safety Integrity Level (SIL); in fact by using floating seat bi-directional seal triple offset valves with an appropriate actuator selection, it is possible to configure the product to assist the required protective function.

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