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Engineering 900

Engineering 900
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Engineering Data Hydrometers - Integrated Water Meter and Valve

BERMAD Waterworks Basic Valve WW-900 Hydrometer DN40 (1½") to DN250 (10") The BERMAD Model WW-900 is a unique product integrating both a Woltman-type water meter and a diaphragm actuated hydraulic control valve, both functions working simultaneously. A water meter, providing a full spectrum of metering functions, from simple visual readout, with pulse or analog 4 – 20 mA output for computerized data acquisition ideal for SCADA systems. A standalone hydraulic valve with a full range of control features; On/Off, pressure reducing, sustaining, flow and level control. ■ The flow metering unit...

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BERMAD Waterworks 900 Series 3-Way Cock Valve Local Manual Control Solenoid Controlled Line pressure is applied to the control chamber of the hydrometer through the opened 3-way solenoid or cock valve. This creates superior hydraulic force in the control chamber that causes the valve to close and seal drip tight. Closing the Solenoid or cock valve, discharges the line pressure from the control chamber. This in turn causes the line pressure under the plug to open the valve, and measure the flow. 2-Way Modulating Mode; Pressure Reducing Pilot Closed At zero flow, the closed pilot traps line...

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BERMAD Waterworks Exploded View Control Head Includes: Vacuum-sealed meter register, magnetically coupled to the impeller drive, with robust brass cover. Hermetically sealed control head and register(s). High sensitivity, providing superior accuracy that meets most water meter standards. Available of Reed Switch and Opto-Electric pulse readers (4 - 20mA optional with converter). Locates, centralizes and fastens diaphragm, spring, and impeller assembly ensuring smooth and accurate performance. Simple and light construction enables quick in-line inspection and service. [3] Auxiliary Closing...

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BERMAD Waterworks 900 Series Technical Data Construction Materials Cover: Epoxy Coated Ductile Iron to EN 1563 External Bolts / Nuts: Stainless Steel 316 Internal Bolts, Nuts and Washers: Stainless Steel 304 and 316 Spring: Stainless Steel 302 Closure Assembly: [6.1] Diaphragm: Synthetic Rubber [6.2] Closure: Glass Reinforced Nylon [6.3] V-Port: Stainless Steel 304 Impeller Assembly: [7.1] Guide: 2” Pa12, 3&4” PVDF, 6-10” 303 Stainless Steel [7.2] Pivots, Bearings, and Thrust Bearings: Tungsten Carbide [7.3] Upper flow Straightener: Glass Fiber Reinforced Nylon [7.4] Impeller: Polypropylene...

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BERMAD Waterworks Technical Data Technical Specifications Available Sizes: DN40 - DN250 (V/2" - 10”) Pattern: Globe End Connections: DN40 - DN50 (1/” - 2”) - Threaded DN80 - DN250 (1/” - 10”) - Flanged DN80 - DN150 (1/” - 6") - Grooved Connections Standard: Flanged:ISO 7005-2 (PN10 & 16, other standards available) Threaded: Rp ISO 7/1 (BSP.P) or NPT Pressure Rating: PN16 Operating Pressure Ranges: PN10: 0.7-10 bar PN16: 0.7-16 bar For lower pressure requirements, consult factory Temperature: Water up to 50°C

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Globe Pattern Connection Type Connection Type

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Flow Properties Q 2 Differential pressure at a given flow, Ap= ( 1Q) Where: VKW Kv = Valve flow coefficient (flow in m3/h at 1bar Diff. Press.) Q = Flow rate (m3/h) AP = Differential pressure (bar) Flow resistance or Head loss coefficient, K=AH Where: V K = Flow resistance or Head loss coefficient (dimensionless) AH = Head loss (m) V = Nominal size flow velocity (m/sec) g = Acceleration of gravity (9.81 m/sec2) Equivalent Pipe Length, Leq Leq = Lk-D Where: Leq = Equivalent nominal pipe length (m) Lk = Equivalent length coefficient for turbulent flow in clean commercial...

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Available Sizes: 1V2"-10” End Connections: 1V" - 2" - Threaded 1V" - 10" - Flanged 1V" - 4" - 6" Grooved Pattern: Globe Connections Standard: Flange: ANSI B16.42 (Ductile Iron) Thread: NPT Pressure rating: Ductile Iron - ANSI Class #150 Operating Pressure Range: 7-250 psi Temperature: Water up to 122°F Output Electrical Data: Reed-Switch: Switching Voltage 48 VAC/DC max Switching current: 200 mA max Switching power: 4W max Connector: Two conductors, Wire lead, 4' cable Opto-Electric: Supply Voltage 5-12 VDC Output type: Complementary Output current: 200 mA Connector: Three conductors, Wire...

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Dimensions and Weights Connection Type AP = (EF Gf Where: Cv = Valve flow coefficient (flow in gpm at Diff. Press. 1psi) Q = Flow rate (gpm) AP = Differential pressure (psi) Gf = Liquid speciflc gravity (Water=1.0) K = AH Vg Where: K = Flow resistance or Head loss coefflcient (dimensionless) AH = Head loss (feet) V = Nominal size flow velocity (feet/sec.) g = Acceleration of gravity (2.18 feet/sec2) Leq = Lk-D Where: Leq=Equivalent nominal pipe length (feet) Lk = Equivalent length coefficient for turbulent flow in clean commercial steel pipe (SCH 40) D = Nominal pipe diameter (feet)...

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