Some relief for pumps
August 2002
Valves, Actuators & Pump Control
The model 480/490 is a spring-loaded liquid relief valve, certified to BS6759 Part 3 by SAFED/AOTC and is unlike any other valve in its range. The design features of this valve make it suitable for pressure relief and by-pass duties for positive displacement pumps.
The design of this particular relief valve ensures that the adjusting spring is completely isolated from the fluid during the discharge operation of the valve. The adjusting spring is housed in a cartridge type assembly, isolated by a spindle 'O' ring manufactured from Nitrile or Viton rubber, according to type.
The main benefits are that the spring is protected from the risk of corrosion and that the valve internals can be cleaned without disturbing the spring setting, alleviating the need to reset the valve. This is possible because the spring housing can be completely withdrawn from the valve body intact.
The spring cartridge assembly can be supplied separately for use as an integral pump bypass relief valve. All 480/490 relief valves are equipped with top guided valve discs that are precision lapped and the valves are available with either male or female threaded connections in BSP or NPT.
There are three valves in the 480/490 series of relief valves, the main difference being the materials of construction. The 480 is a bronze relief valve, the 485 is also bronze, but has a renewable stainless steel seat, while the 490 is manufactured totally out of stainless steel. The fact that the valves are manufactured from bronze and/or stainless steel makes the series suitable for a wide range of corrosive/noncorrosive fluids.
With certified flows of 10% overpressure, the 480/490 series of relief valves are a suitable choice for pump manufacturers and pump users.
For more information: Ron Buchanan, DLM, 011 457 0500, [email protected], www.dlm.co.za
Further reading:
High-flow solenoid valve
Emerson Automation Solutions
Valves, Actuators & Pump Control
Emerson has introduced the new ASCO Series 327C solenoid valve, which features a direct-acting, high-flow design that provides superior flow-to-power ratio. It permits high flows at minimum power levels, making it ideal for use in power plants, refineries, and chemical processing facilities.
Read more...
Proportional cartridge valve series is the fastest in its class
Valves, Actuators & Pump Control
Parker Hannifin is introducing the enhanced version of the proportional cartridge throttle valve series, TFP. The new pilot valve further reduces the step response times by up to 30%, making the TFP the fastest valve in its class.
Read more...
Proportional cartridge valve series is the fastest in its class
Valves, Actuators & Pump Control
Parker Hannifin is introducing the enhanced version of the proportional cartridge throttle valve series, TFP. The new pilot valve further reduces the step response times by up to 30%, making the TFP the fastest valve in its class.
Read more...
Inspection system for leak detection in valves in hazardous areas
Extech Safety Systems
Valves, Actuators & Pump Control
Leaking valves in industrial plants not only lead to loss, safety risks and possible contamination and pollution, but also result in high economic costs. Therefore, valves in hazardous areas require regular proper inspection and preventive maintenance to ensure their functionality.
Read more...
Control head for automation of hygienic process valves
Burkert South Africa
Valves, Actuators & Pump Control
Burkert’s Type 8681 control head is optimised for decentralised automation of hygienic process valves. Thanks to its universal adapter, it can be combined with all normal commercial butterfly valves, ball valves and single- and double-seated valves.
Read more...
Hydroformed tube valve body
Burkert South Africa
Valves, Actuators & Pump Control
One of the most common necessities for manufacturing pharmaceuticals, cosmetics, food and beverages are diaphragm valves. What used to be a dull two-way race between forged and cast body variants is now being challenged by an exciting, ground-breaking technology. The hydroformed, light-weight diaphragm tube valve body will change the way you think about plant design and operation.
Read more...
Global pumping giant ready to support hydrogen economy
Valves, Actuators & Pump Control
With abundant sunshine and wind, southern Africa is perfectly positioned to become a global powerhouse in green hydrogen production. Two key projects are already in advanced stages of development in Namibia. KSB has identified the vast potential of these types of projects in southern Africa, and through its KSB Pumps and Valves subsidiaries in Namibia and South Africa is investing heavily in bringing the right skills to the region.
Read more...
Compact valve position indicator
Emerson Automation Solutions
Valves, Actuators & Pump Control
Emerson’s new TopWorx DVR Switchbox is an entry-level addition to the DV Series of valve position indicators. It combines a durable resin enclosure, compact size, and a patented cam design that provides a reliable valve position feedback for water and wastewater systems, food and beverage production lines, and industrial utilities.
Read more...
Precision, control and performance in regulators and control valves
Valve & Automation
Valves, Actuators & Pump Control
Cashco has long been a trusted name in industrial control solutions, offering a broad range of regulators and control valves designed to meet the rigorous demands of various industries. There are two key Cashco product lines, its regulators and the Ranger QCT control valve.
Read more...
Advanced solutions for valves
Bearing Man Group t/a BMG
Valves, Actuators & Pump Control
BMG delivers state-of-the-art valve solutions to diverse industries across Africa, in collaboration with InterApp, a global leader in the design and manufacture of high-quality valves.
Read more...
printer friendly version