162020
4Pages

FLOW Product Data Sheet Platon Glass Variable Area Flowmeters PLATON FLOWMETERS LGX/NGX Improved industrialised construction Easy to use, high visibility scale Rear ‘blow out’ safety vent Ergonomic design UV stabilised rigid safety cover Gas or liquid flow measurement Operator confidence from float rotation Instantaneous response Accuracy up to ±1.25% FSD Air flow range 5 mL/min to 150 L/min Customised scales Glass tube removal without tools ATEX Infra-red alarm option Range of accessories UKAS calibration optional Available from stock Next day delivery (subject to specification) After sales service and repair ENGINEERED TO FIT Standard or custom scaled glass tubes to suit process fluids and conditions Range of process connections to fit pipework requirements Brass or Stainless Steel end blocks with optional integral flow control valve Supplied with studs for surface panel mounting ACCURATE MEASUREMENT Flow up the tapered tube lifts the float to an equilibrium position. Flow rate is then measured against the flat top edge of the float. FLOWMETER CHOICE A complete VA flowmeter consists of a glass flow tube and float scaled to the flow units required, and a frame to provide the end block supports and to cover and protect the tube. The NGX series frames use flow tubes with nominally 100mm long scales, whereas the smaller LGX frames use flow tubes with nominally 30mm scales. To choose a complete flowmeter select the frame code required, and separately specify the fluid flow range needed on the flow tube scale. NGX and LGX series frames are designed to fit your process. The options available allow easy installation, usually surface mounted on a vertical panel. Process connections and labelling can be customised to suit the application.

SPECIFICATION – FRAMES NGX FLOW RANGES – 100mm Scale * - Suffix letter defines standard scale markings. Tubes can be custom scaled for the required fluids and line pressure/temperature conditions (See correction factors on page 4). White polyester powder coated aluminium Suffix B – Bright nickel plated brass Suffix S – Stainless Steel Seals Nitrile on brass units Viton on Stainless Steel units Alternative seals available Cover Clip on clear UV stablised rigid polycarbonate (required to locate flow tube into end blocks) Connections Models available with in-line or rear facing process...

STANDARD FRAME CODES Typical Model: NGX - Standard size (100mm scale) LGX - Reduced size (30mm scale) T - Rear facing connections V - Built in needle valve with rear connections ■Process Connections -►O-ring Seals -►Frame Size Chosen to suit flow tube required EXTERNAL CONNECTIONS Safety Vent: Allows rear event of glass tube CUSTOM BUILD Construction of the NGX and LGX series frames makes custom build or special process connections easily achievable, whether for rear facing or mixed rear/in-line fittings. Specific custom logos can be printed on the glass tubes and polycarbonate covers if...

HAZARDOUS FLUIDS Flowmeters constructed from PTFE or plastic materials are available and can be used for some of these chemicals. Ammonia attacks brass, but can be used with Stainless Steel end blocks and nitrile O-ring seals. The rear blowout vent and polycarbonate cover on NGX and LGX flowmeters offer a measure of operator protection from glass tube rupture or process leakage. However, for increased operator protection or use on exposed plant pipework, model GU safety housings should be used with glass tube meters. Alternatively, type API or GMT metal tube meters provide the highest...