Globe Control Valves
characteristics of the Globe Control
ARFLU Globe Control Valves have been designed for sizes up to 26″ and pressures up to class 2500, depending on the sizes. Leaks, Class IV and V are offered as standard using metal-metal seats. The use of balanced plug avoids the need for large actuators, thus reducing weight and cost.
Bellows or other special covers are also included as an option in this versatile valve range. They can be operated by pneumatic, electric or electro-hydraulic actuators, can include any type of accessory.
Special designs have been developed, mainly for use in Power or Desalination Plants, where High Pressure and Temperature are common conditions.
Noise and vibration have been minimized, thus extending the life of the Globe Control valves. Low noise mouldings and diffusers can be supplied as an integral part of our design.
ARFLU control valves offer the best combination of design and materials to cope with the most severe operating conditions
The main function of a control valve is varying the flow rate of the fluid by producing a pressure drop.
This results in an energy loss which is converted into turbulence and, as side effects, into vibration, noise and erosion. When handling high temperature water, cavitation is an added problem. To minimize wearing and provide long life internals, selection of the best suited type of trim has the upmost importance. Also, the correct materials have to be used.
Noise and cavitation problems are solved with special designs of internals. Arflu has the designs, the materials and the experience to offer the best choice for every application.
Body and Bonnet
Pressure retaining parts include body, bonnet and bolting. Design is according to and meets all the ANSI, ASME and DIN applicable standards.
Face to face dimensions are according to ISA S75.12, 15 and 16. Sealing of body-bonnet joint is achieved by spiral gaskets made from 316SS and graphite as standard.
Gaskets are fully enclosed between the body and bonnet and they work under the principle of controlled compression. To achieve this, manufacturing / maintenance procedures provide the correct torques for every size of the bolting.
ARFLU MANUFACTURING RANGE
ARFLU, is known for the extensive manufacturing range, we manufacture large number of valves in almost all sizes and materials. If you do not find the valve you need in the box attached, please contact our sales representatives and we will study the feasibility of producing in other dimensions.
INTERNATIONAL DESIGN STANDARDS
DESIGN AND MANUFACTURE:
ASME B 16.34: Valves-Flanged, Threaded, and Welding End.
B5-5352 (sustituída por ISO 15761)
INSPECTION AND TEST:
ISO 15848: Industrial valves — Measurement, test and qualification procedures for fugitive emissions
ANSI FCI 70.2: Control valve seat Leakage
ASME B 16.5: Pipe Flanges and Flanged Fittings.
WELDED OR THREADED ENDS:
ASME B16.25: Buttwelding ends
ASMEB16.11: Forged fittings, socket-welding and threaded
ASME B1.20.1: Pipe threads general purpose.
FACE TO FACE AND END TO END:
ASME B 16.10: Face-to-Face and End-to-End Dimensions of Valves.
ISA S 75.12, ISA S 75.15, ISA S 75.16
* Other standards/materials upon request