Located in the city of Hadera, one of Israel's largest and advanced desalination plants plays a key role in transforming seawater into fresh, drinkable water. From here, the desalinated water is lifted to an operative reservoir at Mekorot's Hadera Pumping Station, then pumped into the "Israel's National Carrier" pipeline, which runs from the north to the south of the country, providing millions of residents with an essential drinking water supply.
The main steel pipeline from Hadera pumping station to the National Carrier is 2,000mm in diameter.The Hadera pumping station is composed of:
- 8 pumps (7 operating +1 stand by)
- Maximum flow capacity: 20,000 m3/h
- Discharge pressure: 170m
- Elevation difference: 84 meters (static head)
The challenge - replacing the existing surge protection solution
The national water company, 'Mekorot' requested BERMAD's expertise, ongoing professional support, and site service to replace the existing surge protection system which has been operating continuously for 15 years. During those years, the pumping station was protected by other hydraulic control valves.
The new solution is expected to be reliable and provide Mekorot with "Peace of Mind", ensuring superior surge protection for such a large-scale strategic bulk line. To ensure accurate and reliable results, BERMAD engineers conducted a surge analysis using advanced transient flow software.
The Solution
Based on a comprehensive analysis of the system requirements, BERMAD proposed the following solution: Five units of BERMAD WW-735-55-09-M DN500 / 20” Surge Anticipating Valves (4 operating + 1 standby). The five valves were installed in parallel to increase the relief flow capacity and reduce the discharge load, providing a fully redundant surge solution. These valves have electric operation by solenoid connected to the pumping station electric board for immediate opening when the pumps trips due to power failure, along with a hydraulic backup of pilots sensing the mainline pressure and opening in severe pressure drops associated with pressure surges.
The BERMAD WW-735-55-09-M valves, part of the BERMAD 700 Series, are known for their high flow capabilities and robust design. They immediately open in response to an electric signal, dissipating high-pressure waves and eliminating surges. The unique hydrodynamic globe design with a special open plug ensures minimal cavitation and noise, even under high differential pressure conditions. Additionally, their ability to smoothly close drip-tight prevents closing surges, enhancing system reliability.
BERMAD’s equipment was installed and commissioned in 2020 and operates with high satisfaction. In addition, BERMAD supplied an air control solution along the rising main using C70 Combination Air Valves.
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