Valve manifolds are instruments that come with one or more valves, which can be connected to a transmitter. This means that these specially designed manifolds can be mounted to a pressure transmitter in a range of sectors such as oil & gas, chemicals, wastewater, power and so on.
This is why valve manifolds can help measure static, variable, gauges and differential pressures. Read on to find out more about valve manifolds. In this article, we will talk you through the design and functions of regular valve manifolds, as well as explaining the advantages of valve manifolds and some of the key features of valve manifolds.
Understanding valve manifolds
To understand the finer workings of valve manifolds, we must understand the basic working principle of a valve manifold. This manifold is a device that connects one or more isolate valves in a hydraulic system. These valves in a hydraulic system can include a ball, needle, bleed and vent valves.
With a block and bleed manifold, the purpose of a valve manifold is to ensure that the fluids from upstream do not come into contact with the components from downstream. The manifold here works to isolate the flow of the fluid in the system.
One of the leading valve manifold manufacturers is Parker. The range of Parker valve manifolds provides a more compact, reliable and cost-effective solution than externally mounted valves. As a result of this, the Parker manifold valve uses fewer connections, whilst resulting in a reduced number of leak points.
What are the design functions of a valve manifold?
The typical valve manifold features a number of key features. These include:
- T-bars for ease of operation
- Gland aching adjusters to adjust wear compression of the brand
- A valve bonnet with replaceable bonnet sealing washers
- An anti-rotational thrust brush that ensures uniform packing compression, maximising pressure-tight sealing which limits cold flow passages
- The bonnet and body washer ensures complete atmospheric leakage, whilst also allowing for on-site retrofit of bonnets with 100% re-sealing assurance
- A dual cap which serves two very distinct purposes. The first is to prevent airborne debris from contaminating the operating thread, whilst the second is to provide a colour-coded functional identification
- A gland adjuster lock nut that works to prevent the inadvertent gland adjuster from loosening over time
Other features of valve manifolds manufactured by the industry-leading brand, Parker, include an anti-blowout spindle that is designed to deliver low torque operation with high-quality micro mirror stem finish for positive gland sealing, as well as gland packing to provide maximum sealing with the need for minimum air adjustment.
These features do vary from valve manifold to valve manifold, particularly dependent on range and manufacturer, however, standard most of these features are included in the design and manufacture of the standard valve manifold solution.
What are the advantages of valve manifolds?
Valve manifolds are used in a number of applications; even from the smallest of mobile machines all the way up to large, heavy industrial plants. Because of this, valve manifolds can be used to improve efficiency, whilst also reducing energy costs overall.
In addition to this, valve manifolds offer increased energy efficiency with shorter flow paths that work to minimise pressure drop and heat whilst reducing installation costs and fluid connections due to a simple and compact design.
Valve manifolds also work to reduce oil leaks and upkeep due to the lower number of connections that can cause fatigue, wear and loosen, whilst their small and compact size is perfectly suited to confined spaces.
Finally, the major advantage of valve manifolds is that the implementation of a valve manifold leads to an improved overall layout and design with less cumbersome hoses and fluid connections.
What are the uses of a valve manifold?
Valve manifolds are a standard accessory for pressure transmitters and differential pressure transmitters. There are three main types of valve manifolds, which are:
- 2-way valve manifold
- 3-way valve manifold
- 5-way valve manifold.
Each of these are well suited to a variety of different applications due to their unique attributes.
Where to use a valve manifold
Valve manifolds are used to maintain the flow of a system in a line or processing application. Because of this, they are suitable for applications that require them to connect two or more valves in a system, which makes them great for use in confined spaces and applications that are short on space.
Valve manifolds are also suitable for use in applications that require them to act as an isolation or shutoff valve. Here, they are used with pressure instruments such as transmitters and can operate to shut off one individual component of the process, or line.
Additionally, valve manifolds are ideal for use in applications that require them to be used in conjunction with a differential pressure transmitter. Here, they work to prohibit over-range and isolate the transmitter from the process line when calibration and maintenance need to take place.
Find out more about valve manifolds
Interested in learning even more about valve manifolds? Speak to your local process instrumentation supplier to learn more about the range of valve manifolds available from industry-leading brands such as Parker and how a valve manifold can be used to increase efficiency and reduce costs.