The Valve Structure

Bi-directional Sealin

Seat non-compressed as disc approaches.

Disc in close position, with no line pressure. Disc in close position, line pressure applied from upstream.

Disc in close position, line pressure applied from

downstream.

Double Offset/Eccentric Design

The double offset design of the Tipvalve High Performance Buttefly Vai ves assures reduced seat wear and bidirectional, zero leakage shut off thro ughout the full pressure range.

At the initial point of disc opening, the offset disc produces a cam-like ac tion, pulling the disc from the seat. This cam-like action reduces seat wear and eliminates seat deformation when the disc is in the open position. Whe n open, the disc does not contact the seat, therefore seat service life is ext ended and operating torques are reduced. As the valve closes, the cam-lik e action converts the rotary motion of the disc to a linear type motion to eff ectively push the disc onto the seat. The wiping action of the disc against t he seat prevents undesirable material build-up from slurries or suspended solids

The soft seat structure

The soft seat valve provides a bi-directional bubble tight shutoff (zero leakage) by the use of a patented seat.

This unique seat design creates a self-energized seal in vacuum -to-low pressure applications.

Under higher pressure conditions, the seat is also designed to p ermit, confine, and direct movement of the soft seat against the dis c edge, up to the full AS ME Class 150, 300 and 600 Cold Working Pressures.

The soft seat is designed for high services with minimal wear an d low torque. Seat replacement is a simple operation, requiring no special tools.

Disc open

The disc and seat are not engaged. In this position, the shou Iders of the seat are fore ed against the cavity sho ulders by the compressio n of the o-ring.

The seat is recessed in side the seat cavity and a cts as a gasket in the anc horing groove area. The seat cavity is sealed from exposure from the proce ss fluid and protects the seat from abrasion and wear. The o-ring, which is completely e ncapsulated by the seat, is also isolated from exposure to the process fluid.

As line pressure increases, the process fluid enters the side wall area and applies a load against the parallel-spaced sidew all and convergent sidewall of the seat. The seat and cavity de sign permits the seat to move axially to the downstream sidew all, but confines the m ovement and directs t he movement radially inward towards the dis c; the higher the line p ressure, the tighter th e seal between the dis c and seat. Because t he o-ring is elastic, it i s able to flex and defo rm under loads and return to original shape after removal of the load; it is the rubber which deforms, not the thermoplastic material. This dynamic se al, patented by Tipvalve, is totally unique among high performa nee butterfly valves.

Disc closed, Self-energized seal

The Tipvalve disc and se at are engaged, and the pro cess fluid is under low pres sure. The edge of the disc, with a larger diameter than t he seat tongue, directs mov ement of the seat radially o utward, causing the seat to compress against the conv ergent sidewalls of the cavit y. The elastomeric o-ring imparts a mechanical pre-load between the disc and seat tongu e as it is compressed and flattened by the disc; this is the sei f-energized mode for sealing at vacuum-to-60 psi.

As the seat moves radially outward, the seat shoulders mo ve away from the cavity shoulders and open the cavity to the process media.

Disc closed, Pressure-energized seal

(Seat upstream)

Disc closed, Pressure-energized seal

(Seat downstream)

The soft seat valve is bi-directional (in some instances, modi fications may be required t o operate this arrangemen tfor dead end service).

The cavity and seat side walls are symmetrically de signed to permit, confine, and direct movement of th e seat to the disc to dynam ically seal with line pressur e in the reverse direction. The disc edge is the segm ent of a sphere, and the se at is angled towards the di sc edge to seal with pipeline pressure in either direction.

Recommended installation direction is seat upstrem

Standard Production Range
	ANSI Class 150	ANSI Class 300	ANSI Class 600
Rating-Psi	285	740	1440
Rating-Bar	20	50	100
Size-Inch	2-60	2-48	44616
Size-mm	DN50-DN1500	DN50-DN1200	DN50-DN600
TESTING Testing	API 598
Face To Face Specification	ANSI B16.10/ API 609 / MSS-SP-68 / ISO 5752
End Flange Specifications	ASME B16.5: Class 150, 300, 600 DIN ISO PN10, PN16, PN25, PN40
Connection	Wafer, Lugged, Double Flanged
Actuaror-Manual	Lever Handle, Worm Gear Operator
Actuator-Automatic	Electric Motor, Pneumatic Double Acting, Pneumatic Spring Return

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Titanium Butterfly Valve Catalogue