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Autoflow ADG-S-S Flow Meter: Mechanical Inline Flow Control Sizing Specs
Quick Answer
The Autoflow ADG-S-S is a mechanical inline flow meter with a built-in needle valve for water, air, and clean fluid batching. Typical line sizes are DN15 to DN50, with pressure up to 10 bar and temperature up to 90 °C. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range for a fixed quote from Silver Instruments.
Mechanical Inline Flow Control Sizing Specs
The ADG-S-S combines a variable area flow tube with direct reading scale and a stainless steel control valve in one body. The S-S designation normally means stainless steel wetted parts. This matters for washdown lines, reverse osmosis skids, and light chemical batching where brass or plastic is not accepted. Common connections are NPT and BSP. Common sizes are DN15, DN20, DN25, DN40, and DN50.
Standard pressure rating is 10 bar at 20 °C. Temperature range is 0 °C to 90 °C for water. Accuracy is plus minus 5 percent of full scale for water and plus minus 6 percent for air. Turndown is close to 10 to 1. This is not a custody transfer meter. Use it for flow monitoring, balancing, component protection, and dosing where local indication is enough.
How to Size the ADG-S-S for Water and Air
Most engineers skip this part and then replace the valve trim later. In practice, sizing starts with two values: minimum flow and maximum flow. The selected meter range should place normal operating flow between 20 percent and 80 percent of the full scale tube. Do not size the meter so normal flow sits at the bottom of the scale. That kills repeatability for a mechanical unit.
Example: a cooling loop in a plastics plant in Thailand needs 0.8 to 3.5 L/min of water. A DN15 tube with a 0.2 to 4.0 L/min water range fits well. The operator sees flow near mid scale at 3 L/min and still reads 0.8 L/min with enough movement. If the same loop later runs at 0.4 L/min, the factory range is wrong. Send the minimum, normal, and maximum values to avoid a mis-sized tube.
Applications We See in Southeast Asia and Other Export Markets
We have seen this on customer sites many times for small line duties. A paint manufacturer in Vietnam uses DN20 units to control rinse water into mixing vessels. A desalination OEM in Oman orders DN25 bodies for permeate sampling panels and installs a nearby PT100 for temperature logging. A dairy in Mexico uses the stainless steel version for CIP chemical dosing at 0.5 to 5 L/min. An Australian generator service company fits the meter on hydrogen cooling skids where inline visibility matters.
These applications share one thing: the flow range is narrow, the fluid is clean, and the operator wants a direct reading without loop power. For dirty water with solids, a mechanical inline flow meter like the ADG-S-S is not ideal. Use a full bore electromagnetic flow meter for sludge or effluent. But for clean water, air, or weak chemical solutions, it works.
Mechanical Inline vs Electronic Flow Meter
The main reason field teams pick the ADG-S-S is simple. It does not need 24 V DC, a transmitter, or a local display converter. That reduces wiring and panel space on small skid packages. A second reason is the built-in flow control valve. Instead of installing a separate valve downstream, the operator uses one body. That saves two fittings and one leak poi
The tradeoff is clear. A mechanical variable area meter has lower accuracy than a Coriolis mass flow meter from Silver Instruments. If you need 0.1 percent mass flow, a Coriolis meter is the correct choice. If you need 5 percent full scale with local flow control and no loop power, the ADG-S-S is a practical pick.
Fluids above 10 cP change the float response. In that case, a positive displacement oval gear flow meter for diesel or oils is a better choice. If your water conductivity is above 5 µS/cm and you need a 4-20 mA HART signal, an electromagnetic flow meter from Silver Instruments gives you remote reading with no moving parts. The ADG-S-S is local indication only.
Price, Lead Time, and Support
Silver Instruments supplies the Autoflow ADG-S-S as factory configured units. We do not keep every range on the shelf in every country. Most DN15 and DN25 water ranges ship from stock in China within 5 to 7 working days. Custom air ranges and BSP threads may add 2 to 3 weeks. We ship to Vietnam, Indonesia, Thailand, Australia, Mexico, Chile, Nigeria, Kenya, the UAE, and other industrial markets.
Here is the thing: a wrong flow range costs more than a short delay. Send full operating data before we place the factory order. That avoids a meter that looks right but reads at the bottom or runs above the top of the scale.
FAQ: Five Key Questions
Q: What flow range do I need for water?
A: Start with minimum and maximum L/min. A typical DN15 tube covers 0.2 to 4.0 L/min. DN20 and DN25 tubes cover higher ranges. The normal flow should sit between 20 percent and 80 percent of full scale.
Q: Can the ADG-S-S be used for air?
A: Yes. Air ranges are usually selected at standard conditions. Factory tables change by pressure. Provide your pressure in bar, temperature in degree C, and flow in kg/h or L/min. Then the correct tube and float can be selected.
Q: Does the ADG-S-S come with a 4-20 mA output or HART?
A: No. The ADG-S-S is a mechanical inline flow meter with local scale only. If you need a 4-20 mA HART output, Silver Instruments can quote a thermal mass flow meter for air or an electromagnetic flow meter for conductive water.
Q: Is the ADG-S-S suitable for ATEX Zone 1 areas?
A: Because the unit is mechanical and has no electrical parts, it can be used where the system assessment allows a passive device. You must verify the fluid and installation against the local safety case. For electronic output in hazardous areas, ask for a meter with ATEX Zone 1 certification.
Q: How do I get a quote and lead time?
A: Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. Include the fluid name and thread type. Silver Instruments will return the ADG-S-S model code, lead time, and shipping cost to your city.
Contact Silver Instruments for a Quote
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range to Silver Automation Instruments. Include the fluid name and whether you need NPT or BSP threads. We will quote the Autoflow ADG-S-S model code, lead time, and freight.
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
Website: flow-meter.com.au
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