Innovative manifold for coplanar transmitters

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 April 2001

95

Keywords

Citation

(2001), "Innovative manifold for coplanar transmitters", Anti-Corrosion Methods and Materials, Vol. 48 No. 2. https://doi.org/10.1108/acmm.2001.12848bad.014

Publisher

:

Emerald Group Publishing Limited

Copyright © 2001, MCB UP Limited


Innovative manifold for coplanar transmitters

Innovative manifold for coplanar transmitters

Keywords: Parker Hannifin, Transmitters

Parker Hannifin has launched an innovative manifold design for the new generation of Rosemount coplanar process transmitters. The manifold, Parker Hannifin informs us, offers factory-fitted compression tube ends, providing a "connectionless" interface which eliminates any requirement for PTFE tape or sealant and makes it impossible to damage the manifold body because of mis-assembly or thread galling.

3051 coplanar transmitters are described as being considerably smaller and lighter than conventional process instruments, but feature a new style of sensor interface. This demands either a flange to adapt the instrument for conventional manifolds, or a new type of manifold which can interface directly. Parker's new CP range of coplanar-compatible manifolds is reported to provide this direct connection, utilising design principles which boost integrity and life expectancy compared with competitive products.

The manifolds are said to eliminate the need to make tapered thread connections into the manifold block – and with it any risk of scrapping the manifold if threads get galled or crossed – by means of pre-fitted 1/2-inch or 12mm compression instrument tube fittings.

The use of twin- or single-ferrule fittings is believed to have the valuable benefit of eliminating the need for any PTFE tape or anaerobic sealant, a major cause of problems in the field. This attribute is thought to make the manifolds particularly suitable for any unmanned environments, and applications involving hazardous fluids or oxygen, for example. If the factory-fitted tube ends should ever be inadvertently damaged, these low cost sacrificial items can be replaced with ease.

Parker also informs us that, when used in combination with its novel one-piece flanges for interfacing process piping to fluid instrumentation, which also feature integral compression tube fittings, the manifolds allow flow and pressure transmitter users to achieve new levels of integrity.

The cost savings achievable by using CP manifolds are thought to be significant. On a trial, Parker reports that it has shown that two tubes can be connected in less than a third of the time required for female-ended connections (applying tape to male thread, fitting male thread into end, assembling fitting). For installations like floating platforms, with requirements for perhaps 1,000 manifolds, the reduction in labour achievable by OEMs and panel builders is believed to be considerable.

Parker CP manifolds are available in two-, three- and five-way variants for pressure and flow applications, rated for pressures of up to 6,000psig. They are provided ready-fitted with low operating torque globe-style valve cartridges. This configuration is said to make them suitable wherever positive shut-off performance at high pressure is required, such as in the offshore or hydrocarbon processing industries.

The manifold body may be specified in stainless steel, Monel, 6Mo or Hastelloy, with other exotic materials available to custom order. Depending on the application, users can specify metal-to-metal, or soft-tip valve seating.

In addition to the standard configuration with factory-fitted tube ends, the manifolds are available with conventional threaded connections if required.

The new CP manifolds feature both UNC and metric threaded base mounting holes for compatibility with worldwide installation practices.

A technical guide is available on request from Parker (www.parker.com).

Details available from: Parker Hannifin Instrumentation Products Division. Tel: +44 (0)1271 313131; Fax: +44 (0)1271 373636; E-mail: ipd@parker.com Web site: mamin@pmail.emirates.net.ae

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