Reservoir Specification Gate Valves
Download the latest reservoir spec gate valve datasheets below
Gate valves are generally designed to be used for infrequent isolation applications and are commonly installed for this purpose in water and wastewater systems.
Standard water systems with a pressure rating of PN16 are commonly designed with flow velocities ranging up to and including a maximum of 4m/s as per EN1074-1, Table 2. However, there are instances when this maximum flow velocity must be exceeded and for these special installations, it is important to select a suitable isolation gate valve that can perform and operate safe and well under these conditions.
Typical examples involving increased flow velocities may occur on older existing piped systems that require an increased flow rate and also on dam and reservoir installations. A large percentage of UK Reservoirs incorporate draw-off pipework that facilitates the release of water from the reservoir. This draw-off can be used for several functions including flow compensation. However, it is commonly used to enable the scour of silt and also to provide a means of emergency drawdown of the reservoir to prevent issues such as flooding and over-loading of the dam structure.
The emergency drawdown rates can be different depending on the reservoir requirements however, the resulting flow velocities through the pipework and valves can be considerable.
Increased flow velocities can be problematic for piped systems as they can lead to an increased risk of cavitation, vibration, noise and accelerated wear and tear.
The use of standard gate valve products in these applications could be considered as sacrificial and by selecting a suitable gate valve for isolation on high velocity systems, this will ensure that the valve will achieve a longer service life resulting in reduced downtime, reduced valve repairs, reduced whole-life costs and an overall increase in system efficiency.
Water Companies in the UK have gate valves that have been in use for several decades and in some cases in excess of 100 years. These assets are understandably at the end of their service lives and Water Companies require a more robust gate valve that will provide a longer lifetime compared to standard gate valve products - especially in applications that are deemed to have a high cost of failure, such as reservoirs. At Glenfield Invicta, we recognise the importance of this application and are pleased to offer a product that meets these high velocity requirements.
This product is the Series 54 Reservoir Specification Gate Valve.
The Reservoir Specification gate valve is an enhanced version of the AVK Series 54 product range and has several key features which allows it to be used under more extreme conditions and can be used for isolation of piped systems with flow velocities of up to 9m/s.
These key features are
- Shoes & Channels
- Jacking Screw (or Easing Screw)
- Fixation of body seat and wedge face rings
- Corrosion protection
Options
The Reservoir Specification gate valve can be supplied with a range of options. The main ones are described here:
- Bypass valve
- Direction of operation
- Gearbox
- Electrical actuation
- Hydraulic actuation
- Extension spindle arrangements
- Mechanical fittings
- Site services
For more information on Reservoir Specification Gate Valves, download the features and benefits guide or the data sheets below.
Are you looking to speak to an expert about gate valves?
Please contact Greg Morris, our dedicated in-house dams and reservoirs expert, call him directly or if you would prefer to email simply click on the email link.
