Product category:
Valves and manifolds
News Release from: Tyco Flow Controls | Subject: Neoseal
Edited by the Processingtalk Editorial
Team on 08 January 2004
Lined butterfly valves for corrosive
applications
For demanding or corrosive processes in the chemical, pharmaceutical, cosmetic and food industries where common elastomers are unsuitable, Neotecha has developed the lined NeoSeal butterfly valve
For demanding or corrosive processes in the chemical, pharmaceutical, cosmetic and food industries where common elastomers are unsuitable, Neotecha has developed the lined NeoSeal butterfly valve For demanding or corrosive processes in the chemical, pharmaceutical, cosmetic and food industries where the use of common elastomers is unsuitable, Neotecha has developed the lined NeoSeal butterfly valve
This article was originally published on Processingtalk on 12 Jan 2005 at 8.00am (UK)
Related stories
Corrosion resistant seating for butterfly valves
Tyco Neotecha NeoSeal butterfly valves are now available with a groundbreaking new series of TFM valve seats and linings for use in the most demanding and aggressive chemical applications
Wide-bodied valve solves problem with pipe linings
Tyco Valves and Controls has introduced an innovative new wide-bodied butterfly valve to overcome the problems commonly experienced with valve operation as a result of thick, protective pipe linings
A thick PTFE lining totally eliminates the need for exotic metals in the valve body and provides positive flange sealing, aided by an elastomer backing for positive contact and tight disc seating.
As the disc and liner are the only two valve parts in contact with the process media, it minimises both leakage paths and damage to the valve from the process media.
Both liner and disc form an integrated part of the primary and secondary shaft sealing, and are moulded and machined for low torque, less stress and deformation during operation, and elimination of tearing and bunching.
Further reading
Safe sampling solution
The problem of obtaining process samples from reactor vessels without requiring process shutdown has been solved by the PV vessel sampling device from Neotecha, giving more accurate results
Tyco - an AVID provider of the latest technology
A comprehensive integrated system of control accessories designed for hazardous area or general process applications, is provided by the state-of-the-art AVID range from Tyco Valves and Controls
The one-piece thin disc stem is lined with 3mm moulded PFA, providing high Kv values.
An upper and lower set of belleville springs provides the pressure necessary to keep the two sealing surfaces together, resulting in a superior stem seal.
This preloaded contact between disc and liner hub, combined with an oversized shaft diameter in relation to the shaft hole in the liner, provides droptight shut-off in both directions up to 10 bar, in accordance with EN 12266-1 and 2.
As a result of the well-engineered soft seal construction, emission has been reduced to a minimum.
The NeoSeal is TA-Luft and VDI 2440 certified.
Certified to ISO 5752/5 short (EN 558-1/T5), the Neoseal is offered with various corrosion resistant disc materials including PFA, UHMWPE, stainless steel and titanium, to satisfy specific process requirements.
The NeoSeal can be supplied in accordance with ATEX directives group 2, category 2 G/D.
NeoSeal has performed successfully in vacuum tests with helium, at pressures as low as 20 Pa absolute (0.2 mbarA).
The wafer and lugged split body design includes body locating holes for easier installation and to ensure perfect centring of the valve between flanges.
The valve also incorporates an integral actuator flange and stem dimensions to ISO 5211.
NeoSeal can be specified in wafer, lugged, and double flanged configurations, to DIN PN10/16, ANSI 150 and JIS 10K, in connection sizes ranging from 40-600mm.
It is suitable for temperatures from -40 to +200C.
Neotecha products are available from Tyco Valves and Controls, the leading name in the manufacture and supply of valves, actuators and controls.
• Tyco Flow Controls: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
