Regulating technology, tried and tested
for guaranteed constant discharges
No electrical power required

The Challenge

Mod­ern hydraulic man­age­ment con­cepts require throt­tling devices to be con­sid­ered. The ide­al is where the flow curve is per­pen­dic­u­lar pro­vid­ing a con­stant dis­charge. Throt­tling con­trols are required for foul and sur­face water sys­tems, for water­cours­es and riv­er con­trol. These reg­u­lat­ing devices are required to pro­vide pre­cise dis­charge con­trol through­out the reg­u­lat­ing range. 

The Solution

The ori­fice cross sec­tion is adjust­ed to main­tain a con­stant dis­charge by a ver­ti­cal­ly oper­at­ing shut­ter plate. The shut­ter plate is con­nect­ed to a float arm which relates the water lev­el to a con­trol cam. The pre­ci­sion of the con­trol cam design enables the flow to be reg­u­lat­ed to an accu­ra­cy of ± 5% from design point. All HydroSlide^® Flow Reg­u­la­tors are com­mon­ly sup­plied with­out a ‘First Flush’ func­tion (see tech­ni­cal doc­u­men­ta­tion); how­ev­er, a first flush func­tion can be pro­vid­ed for use in foul sew­ers per­mit­ting the ini­tial debris to pass down­stream pri­or to reg­u­lat­ing. In such cas­es, the HydroSlide^® Flow Reg­u­la­tor can be adapt­ed to any required set­ting. The reg­u­la­tors of the mod­el series DR 200 or small­er have a dou­ble valve. A pull cable is stan­dard for dis­charges less than 60 l/s to enable man­u­al open­ing of the unit in case of block­ages, although in foul sew­ers auto­mat­ic open­ing oper­a­tion is rec­om­mend­able for dis­charges ‹ 25l/s. When man­u­al­ly opened, the HydroSlide^® Flow Reg­u­la­tor opens the whole ori­fice to enable debris to pass through. All reg­u­la­tors are pro­vid­ed with a bench­ing pro­fil­ing guide.

The HydroSlide^® Flow Reg­u­la­tor mod­els VN and VS are fit­ted with a shut­ter plate con­trolled by a float arm, which moves the plate ver­ti­cal­ly with­in the out­let ori­fice. The entire con­trol mech­a­nism is ful­ly pro­tect­ed from col­lect­ing dirt by a hous­ing cov­er. Two hand pul­leys enable the safe man­u­al open­ing of the reg­u­la­tor unit’s out­let from ground lev­el in the case of block­age or if upstream flush­ing is required.

The Advantages

• no exter­nal pow­er source, no electricity
• sim­ple, robust construction
• rope pul­ley — man­u­al open­ing from above ground (up to and incl. DR 250)
• con­trol mech­a­nism pro­tect­ed by housing
• no sole jump
• with­out ini­tial flush
• wet instal­la­tion avoids sep­a­rate shaft
• favourable dis­charge cross-sec­tion dur­ing throttling
• adapt­able for oth­er dis­charge para­me­ters by exchang­ing disc cam
• option­al: VARIO func­tion for Q_ab set­ting