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Dial Type Flow Meter: Mechanical Pointer Face Volumetric Main Pipe Valves
Quick Answer: A dial type flow meter with a mechanical pointer face gives direct volumetric reading on main pipe valves without external power. It suits oils, fuels, water based fluids, and clean chemicals where local flow total must stay visible at the pipe. Send your fluid name, pipe size in DN, flow range, and pressure to Silver Automation Instruments for a matched model and price.
What This Meter Does on a Main Pipe
The meter body contains a positive displacement measuring chamber. In most cases it is a pair of oval gears. Fluid enters the inlet side and pushes the gears. Each rotation moves a fixed volume. The rotation drives a mechanical pointer on the dial face through a gear train. The pointer face shows total volume or batch volume. No battery is needed for the mechanical display. No loop power is needed for the local dial. This is why engineers choose a dial type flow meter near main pipe valves in remote pump stations and tank farms.
Why a Mechanical Pointer Face Works for Main Pipe Valves
A field operator near the pipe valves needs a reading without opening a transmitter. A mechanical pointer face gives that reading directly. It also stays on the last total when the pump stops. In practice, a diesel storage line in Malaysia only needed a local batch total. A mechanical dial saved the cost of a display, cable, and conduit. The meter was installed between an upstream shutoff valve and a downstream control valve. A strainer protected the oval gears from pipeline debris.
Typical Applications and Customer Cases
We supply these meters for fuel oil transfer, solvent batching, water treatment chemical dosing, and food oil batching. A paint manufacturer in Southeast Asia uses a dial type oval gear meter on a solvent main line. The line runs at 5 bar and 35 degrees Celsius. The meter body is aluminum with a mechanical pointer face. Last year a customer in Vietnam asked us for a diesel flow meter on a 50 mm main pipe. We recommended a cast iron volumetric meter with a local dial and a pulse output for the PLC. The pointer face still worked when the PLC signal was offline.
Specifications That Decide the Model
The key inputs are flow range, fluid viscosity, pipe size, pressure, and temperature. A DN25 oval gear meter can handle 2 to 50 liters per minute for diesel at around 3 cP. A DN40 meter can handle 10 to 250 liters per minute for water at 1 cP. A DN50 meter can handle 20 to 400 liters per minute for medium fuel oil. Accuracy is usually within plus or minus 0.5 percent of reading for medium viscosity fluids. Repeata
Installation Notes for Main Pipe Valve Lines
Mount the meter after a shutoff valve and before a control valve. This keeps the meter body full of liquid. Keep a strainer upstream. Open the upstream valve slowly. A fast opening can shock the measuring chamber and bend the pointer shaft. If the main pipe cannot stop for cleaning, put a bypass loop around the meter. The mechanical dial type meter does not require a long straight run. Oval gear designs are less sensitive to flow profile than turbine or vortex meters.
Body Materials and Output Options
Wetted materials include cast iron, aluminum, 304 stainless steel, PPS, and PTFE or Viton seals. Pipe connections can be threaded, flanged, or tri clamp. The pure mechanical version has a local pointer only. You can add a pulse output or a 4-20 mA HART transmitter if the control room needs a signal. The dial still works as a local backup in that case. This is common for fuel depots in Peru and water treatment plants in the Philippines.
How to Order a Dial Type Volumetric Meter
Send us your fluid name, viscosity in cP, flow range in liters per minute or cubic meters per hour, pressure in bar, temperature in degrees Celsius, and pipe size in DN. Also tell us the valve connection type and whether you need a strainer. We will reply with a recommended model, body material, and price within 24 hours.
Contact Silver Automation Instruments:
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
Website: flow-meter.com.au
FAQ
What is a dial type flow meter with a mechanical pointer face?
It is a positive displacement meter that uses oval gears or a rotating chamber. The dial face shows total volume or batch volume without external power.
Which fluids work with these volumetric meters?
Clean oils, diesel, biodiesel, solvents, resins, water based chemicals, and food grade oils work well. Use a strainer if the fluid may contain particles.
What pipe sizes are available?
Common sizes are DN15 to DN100 for mechanical pointer models. Some designs can go to DN150 on request.
Can the meter connect to a PLC or remote display?
Yes. You can add a pulse output or a 4-20 mA HART transmitter. The mechanical dial remains as a local backup.
How do I get a price for a main pipe valve installation?
Send your flow range, pipe size in DN, fluid viscosity, pressure, and temperature. Silver Automation Instruments will quote the meter and a strainer if needed.
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