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Read and adjust flow at your equipment with Ryutai Kogyo panel flowmeters and purge meters. The GPB, GPC, PGH, GDR and AMF families offer glass or acrylic measuring tubes for direct local indication, with mounting and valve arrangements selected for the installation.
Select the model using the fluid, flow range, operating pressure, temperature and available panel space.
Bring flow indication to the front of your equipment with Ryutai Kogyo panel flowmeters and purge meters. These variable area instruments display instantaneous flow through the position of a float inside a transparent tapered tube.
The GPB, GPC, PGH, GDR and AMF families provide different arrangements for equipment panels, laboratory installations and small-flow pipework. Choose the measuring range and construction around the actual application, then check connections, mounting space and valve access.
| Model | Measuring tube | Format and features | Selection focus |
|---|---|---|---|
| GPB | Glass | Panel and laboratory flowmeter with rear threaded connections and a mirror behind the measuring tube. | Check the required scale, valve position and panel mounting dimensions. |
| GPC | Glass | GP-series panel and laboratory flowmeter. | Compare its flow capacity, connection arrangement and dimensions with the available equipment space. |
| PGH | Glass | Panel-type purge meter with flow-adjustment valve configurations. | Specify the purge flow, operating conditions and upstream or downstream valve arrangement. |
| GDR | Glass | Compact direct-reading flowmeter with threaded connection options. | Confirm mounting suitability, connection orientation and whether a flow-adjustment valve is required. |
| AMF | Acrylic | Lightweight panel flowmeter with Rc 3/8 connections. | Check acrylic compatibility, flow scale and operating limits. |
Mounting note: These models are not mechanically interchangeable. Confirm the panel opening, fixing arrangement, connection centres and clearance behind the panel before ordering.
GPB, GPC, PGH and GDR use glass measuring tubes. AMF uses an acrylic measuring tube. Select the tube together with the float, connections and seals; the tube material alone does not establish compatibility with the fluid.
Include any cleaning agents, additives and temperature changes in the specification. For an existing installation, identify the original materials before selecting a replacement.
| Item | AMF specification |
|---|---|
| Connection | Rc 3/8 |
| Measuring principle | Variable area with acrylic tapered tube |
| Rangeability | 10:1, covering 10–100% of the selected full-scale value |
| Accuracy | ±5% of full scale |
| Maximum working pressure | 0.4 MPa gauge / 4 bar |
| Temperature | 0–50°C; continuous use up to 40°C |
| Water scale options | 30–300, 50–500, 90–900 or 120–1200 L/h |
| Flow direction | Lower rear connection to upper rear connection |
Each water range above is a separate scale option. Confirm the required range and fluid conditions when ordering. These AMF ratings do not apply to the glass-tube models.
A needle valve allows manual adjustment of flow where that configuration is fitted. Specify whether the valve should be accessible above or below the measuring tube, together with the available operating pressure.
For pressurised gas applications, Ryutai describes a downstream valve arrangement that uses the upstream pressure as the meter’s scale-setting pressure. Vacuum or other operating arrangements require separate selection.
A needle valve alone does not guarantee constant flow when supply or downstream pressure changes. If stable flow under varying pressure is required, include that requirement when requesting a suitable arrangement.
The older PGF series has been replaced by PGH. For an existing PGF-N installation, provide the complete model identification and scale details so the appropriate PGH configuration can be selected.
Check the connection size, installation dimensions, valve position, measuring range and operating conditions. A successor model should not be assumed to fit the original panel or pipework without verification.
For liquids: Provide the liquid name, density, viscosity and temperature. State the lowest flow that needs to remain readable and the highest expected flow.
For gases: Provide the gas composition, pressure and temperature. Specify whether the required units refer to actual operating volume or normalised volume, including the reference conditions.
For larger inline installations, compare the Ryutai GTF, ATF, GTV and ATV flowmeter families.
Contact us for pricing and availability. Please include:
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Read and adjust flow at your equipment with Ryutai Kogyo panel flowmeters and purge meters. The GPB, GPC, PGH, GDR and AMF families offer glass or acrylic measuring tubes for direct local indication, with mounting and valve arrangements selected for the installation.
Select the model using the fluid, flow range, operating pressure, temperature and available panel space.
The Ryutai Kogyo MCF metal tube flow transmitter provides flow indication and, depending on configuration, an electrical signal for remote monitoring equipment.
The Elster Kent H4000 Woltmann water meter measures accumulated cold water consumption for commercial, industrial and water distribution applications.
RCM Flo-Gard II liquid flow switches detect when flow crosses a selected setpoint, providing a contact signal for an alarm or equipment interlock. Applications include cooling-water circuits, chillers and compatible process-liquid systems.
The RCM Flo-Gage differential pressure flowmeter provides a direct local reading of liquid or gas flow. The mechanical indicator operates without external power and can be specified for water, compatible oils, compressed air and other gases.
The Ryutai Kogyo EM series metal tube variable area flowmeter measures flow with a magnetically coupled indicator. Select local indication or additional electrical functions to suit your installation.
The Ryutai Kogyo ADF water flowmeter provides a direct visual reading of instantaneous water flow through a transparent acrylic tapered tube. Its compact inline design suits local checks on water supply and circulation pipework.
The Ryutai Kogyo GTF, ATF, GTV and ATV variable area flowmeters provide direct visual indication of liquid or gas flow. Choose the measuring tube and wetted materials to suit your fluid, pipework and operating conditions.
Standard installation is vertical with bottom-to-top flow. Measuring scales, connections and alarm options depend on the selected configuration.
Tokico electronic positive displacement flowmeters measure oil volume with a local digital display and optional signal outputs. Select the appropriate configuration for diesel, light oil, heavy oil, lubricants or crude palm oil (CPO).
For CPO and heated oils: Confirm fluid temperature, viscosity and material compatibility before selecting the meter.
Tokico positive displacement oil flowmeters measure accumulated oil volume through a mechanical counter. Select the appropriate model for diesel, kerosene, heavy oil or other compatible oils.
For digital indication and signal-output options, see the Tokico electronic oil flowmeter.
