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302921

Product catalog summary

Overview: The Platon Automatic Flow Controller, specifically the Flostat Types B & LB, is designed to limit the maximum rate of liquid flow in a pipe regardless of pressure changes, while minimizing resistance to normal flow. It operates automatically without power, offering high accuracy and fast response.

Features: The controller is automatic, requires no power, and features a balanced control valve for high accuracy. It has a fast response due to a short feedback path and is simple and reliable.

Flow Ranges: The Flostat Types B and LB are suitable for 2”–4” pipes, with Type B units factory set for a specific flow rate and Type LB units adjustable over a 6:1 flow range using an external handwheel.

Principle of Operation: The Flostat combines a flow measuring orifice and a balanced control valve. Pressure differences act on a pressure-responsive element, adjusting the valve to maintain the desired flow rate.

Specifications: The body is made of mild steel epoxy coated or stainless steel, with stainless steel valve trim. The diaphragm options include Nitrile, Viton, or stainless steel bellows. It supports flanged connections to BS, EN, or ANSI standards, with a control accuracy of ±5% and reproducibility of ±2%. Maximum temperature for Nitrile and Viton is 80°C, with a maximum pressure of 20 bar.

Special Models: Variants include high-pressure models, pneumatic or electrically-operated set point adjustments, irrigation models, and aviation kerosene units.

Applications: Flostats are used where power is unavailable, control settings are rarely changed, or installation positions are remote. They prevent excessive flow, protect machinery, and ensure long-term reliability. Applications include water treatment, irrigation, pump safety, fluid distribution and blending, meter protection, and cooling and conditioning.

Installation and Calibration: Each Flostat is calibrated with a straight approach pipe and vertical spring housing. Installation should mimic factory calibration to ensure accuracy. The controller should be oriented to prevent sludge accumulation and avoid air filling when liquid flow stops.

Dimensions and Weight: Detailed dimensions and weights are provided for both Type B and Type LB units, with specific measurements for different pipe sizes.

Contact Information: For inquiries, contact the head office at 2 Downgate Drive, Sheffield, S4 8BT, England, or via email at [email protected].

Catalog excerpts

Product Data Sheet Platon Automatic Flow Controller PLATON FLOSTAT TYPES B & LB An automatic flow control valve and governor to limit the maximum rate of liquid flow in a pipe - irrespective of pressure changes - whilst presenting the minimum resistance to normal flow. • Automatic - no power required • High accuracy - balanced control valve • Fast response - short feedback path

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STANDARD SPECIFICATION Automatic Self-Acting Flow Control Valve and Governor for 2”–4” pipes (50mm–100mm) Type B units are factory set for a user defined flow rate. Type LB units control at a flow rate adjustable over a 6:1 flow range using the external hand wheel. Valve Trim Diaphragm Connections Control Accuracy Reproducibility Maximum Temperature Maximum Threshold Valve Maximum Pressure Hydraulic Test Pressure Mild Steel Epoxy Coated or Stainless Steel Stainless Steel Nitrile, Viton or Stainless Steel bellows Flanged to BS, EN or ANSI standards ±5% ±2% Nitrile and Viton 80°C See table 20 bar...

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FLOSTAT APPLICATIONS The Flostat brings automation of fluid handling within the reach of industries requiring accurate and reliable control with a substantial cost benefit over the conventional servooperated control valve. Obvious examples of applications for the Flostat are where:- COOLING AND CONDITIONING Flostats are utilised to control the cooling water flow in air conditioning and refrigeration plant to maintain optimum efficiency. Power is not available Control setting is rarely changed Installation position is remote or dangerous It is necessary to prevent excessive flow There is a need...

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When placing an enquiry, please give all possible details as the manufacturers have great accumulated experience in this specialised field and could contribute valuable guidance. Certainly do not omit to specify the following:- For permanent and accurate control, it is only necessary to ensure that the available pressure does not fall below the Threshold Value which is the minimum required to provide the control force and to overcome friction losses (P1-P3). Pipe size Preferred Materials and Connections Control Setting and if adjustment required Pressure conditions upstream and downstream Fluid...

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