BERMAD Waterworks BERMAD Waterworks BERMAD Waterworks Typical Applications Technical Data Bi-Level Water Towers Size Range: DN40-900 ; 11/2–36” End Connections (Pressure Ratings): Flanged: ISO PN16, PN25 (ANSI Class 150, 300) Threaded: BSP or NPT Others: Available on request Valve Patterns: “Y” (globe) & angle, globe (DN600-900 ; 24”-36”) Working Temperature: Water up to 80°C ; 180°F Standard Materials: Body & Actuator: Ductile Iron Internals: Stainless Steel, Bronze & coated Steel Diaphragm: Synthetic Rubber Nylon fabric-reinforced Seals: Synthetic Rubber Coating: Fusion Bonded Epoxy, RAL 5005 (Blue) approved for drinking water or Electrostatic Polyester Powder The Model 750-80-X senses the static head of the water level in the tank by means of a high sensitivity pilot. To do so accurately, the sensing tube end must be connected to a “still point” at the bottom of the tank. The drainage pipe provides this “still point,” a location not influenced by flow velocity as in filling and outflow pipes. Differential Pressure Calculation ΔP =( Level Control Valve with Altitude Pilot ΔP = Differential Pressure for fully open valve (bar; psi) Q = Flow rate (m3/h; gpm) Kv = Metric system - valve flow coefficient (flow in m3/h at 1 bar ΔP with 15°C water) Cv = US system - Valve flow coefficient (flow in gpm at 1 psi ΔP with 60°F water) n High level reservoirs & water towers n Energy cost critical systems n Systems with poor water quality n Inherent refreshing Drainage Altitude Control Valve Model 750-80-X Level Control Valve with Bi-Level Altitude Control Model 750-86 The Model 750-86 adds a low level setting feature to the standard Altitude Control Valve. A high level pilot [1] and a low level pilot [2] are adjusted to open at different settings. Should the static head rise to the closing set point, the high level pilot opens causing the main valve to close. Should the static head drop to the opening set point, the low level pilot opens causing the main valve to open. When the level is between pilot settings, both pilots are closed and the main valve remains in its last position. The 3-Way cock valve [3] enables manual closing of the main valve. Level Control and Pressure Sustaining Valve with Altitude Pilot Model 753-80-X The Model 753-80-X adds the altitude control feature to the Model 730 Pressure Sustaining Valve for applications where prioritizing consumers over reservoir filling is needed. The altitude pilot [1] controls the Pressure Sustaining Control Valve by applying pressure to & venting from the pressure sustaining pilot [2] sealed spring cell. Should the altitude pilot sense static head at the setting, it applies pressure to the pressure sustaining pilot spring cell, and the main valve closes. The downstream cock valve [3] enables manual closing. H (mm / inch) Weight (Kg/lb) L (mm / inch) Suitable for low quality water Reservoir inherent refreshing Weight (Kg/lb) Weight (Kg/lb) Weight (Kg/lb) Weight (Kg/lb) Specify when ordering: Weight (Kg/lb) Line pressure driven – Independent operation Bi-level altitude pilot On/Off service No float, simple installation Major Additional Features Weight (Kg/lb) The Model 750-80-X Level Control Valve is a hydraulically controlled, diaphragm actuated control valve that shuts off at pre-set reservoir high level and fully opens in response to an approximately one meter (three foot) level drop, as sensed by the 3-Way altitude pilot mounted on the main valve. Weight (Kg/lb) 700 Flanged “Y” PN25 “Y” PN16 Class 300 Class 150 Drainage N.C.Valve n Level sustaining at reservoir outlet Flow Data & Dimensions Table [email protected] • www.bermad.com The information herein is subject to change without notice. BERMAD shall not be held liable for PC7WE80 09 any errors. All rights reserved. © Copyright by BERMAD. Size Main model Additional features Pattern Body material End connection Coating Voltage & main valve position Tubing & Fittings materials Operational data (according to model) Pressure data Flow data Reservoir level data Settings * Use Bermad’s Waterworks Ordering Guide Double chamber design Moderated valve reaction Protected diaphragm sustaining with high sensitivity pilot – 75A-83 powered opening & closing – 750-80-B Easy access to valve Easy level setting Less wear and tear Balanced seal disk – High flow capacity In-line serviceable – Easy maintenance Flexible design – Easy addition of features See relevant BERMAD publications.

BERMAD Waterworks BERMAD Waterworks 700 Series Operation The Model 750-80-X is a pilot controlled valve equipped with an adjustable, 3-Way altitude pilot. The pilot senses the static head of the reservoir level via a tube [1] connected to a “still point” at the bottom of the reservoir. Should static head rise to pilot setting, the pilot [2] applies pressure to the upper control chamber [3] via cock valve [4], powering the main valve to shut off. Should static head fall below pilot setting approximately 1m (3 ft), the pilot vents the upper control chamber, causing the main valve to fully open....

BERMAD Waterworks BERMAD Waterworks 700 Series Operation The Model 750-80-X is a pilot controlled valve equipped with an adjustable, 3-Way altitude pilot. The pilot senses the static head of the reservoir level via a tube [1] connected to a “still point” at the bottom of the reservoir. Should static head rise to pilot setting, the pilot [2] applies pressure to the upper control chamber [3] via cock valve [4], powering the main valve to shut off. Should static head fall below pilot setting approximately 1m (3 ft), the pilot vents the upper control chamber, causing the main valve to fully open....

BERMAD Waterworks BERMAD Waterworks 700 Series Operation The Model 750-80-X is a pilot controlled valve equipped with an adjustable, 3-Way altitude pilot. The pilot senses the static head of the reservoir level via a tube [1] connected to a “still point” at the bottom of the reservoir. Should static head rise to pilot setting, the pilot [2] applies pressure to the upper control chamber [3] via cock valve [4], powering the main valve to shut off. Should static head fall below pilot setting approximately 1m (3 ft), the pilot vents the upper control chamber, causing the main valve to fully open....