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『Barco Venturi Flow Meter: Sourcing Legacy HVAC Hydronic Balance Elements』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
Barco Venturi Flow Meter: Sourcing Legacy HVAC Hydronic Balance Elements
Quick Answer: Silver Automation Instruments supplies replacement venturi elements, DP transmitters, and full flow meters for legacy Barco style HVAC hydronic balance loops. We match pipe sizes from DN15 to DN600. Typical output is 4-20 mA HART or 0-10 V for BMS integration. Send us your pipe size, flow range, and pressure rating for a direct quote.
Legacy Barco venturi flow meters still operate in many chilled water and hot water systems. Buildings constructed in the 1990s and early 2000s often used these inline venturi devices for hydronic balancing. The venturi body stays in the pipe. The differential pressure element or the impulse valve wears out first. In practice, you do not always need a full meter replacement. You may need only the throat insert, the DP transmitter, or a new balancing valve element.
Here is a common field situation. A hydronic balancing contractor in Singapore had a 150 mm chilled water line with a Barco venturi from 1998. The original differential pressure transmitter was dead. The part number was obsolete. Local distributors quoted 8 to 10 weeks. The customer kept the venturi body and installed a Silver Instruments SDP100 differential pressure transmitter. Calibration range was 0 to 25 kPa. The BMS received a 4-20 mA HART signal. Commissioning took under three hours.
Common Barco Venturi Models and Replacement Logic
Most legacy Barco venturi flow meters follow the same hydraulic principle. The venturi throat creates a pressure drop. The DP transmitter converts that drop into flow. The flow calculation follows the square root law. Because the venturi body has no moving parts, it rarely fails. The transmitter and impulse lines fail first. Accuracy depends on the throat diameter, upstream straight run, and transmitter calibration. We machine replacement venturi throats to match the original diameter. We also match the impulse line spacing so the existing pipe taps work without welding.
For DN50 to DN200, the standard accuracy is ±1.0 percent of reading after a 10D upstream straight run. For DN250 to DN600, accuracy can be ±1.5 percent depending on site conditions. The SAV venturi flow meter is our direct replacement series. Sizes range from DN15 to DN600. Pressure ratings include PN16, PN25, ANSI 150, and ANSI 300. Wetted materials are 304 stainless or 316 stainless. The venturi body length is machined to the original face to face dimension. Impulse line connections are G1/4 or 1/4 NPT. Typical differential ranges are 0 to 10 kPa, 0 to 25 kPa, and 0 to 50 kPa.
Pair the venturi with a Silver Instruments SDP100 differential pressure transmitter. The SDP100 accepts impulse line inputs and outputs a square root flow signal. You can choose 4-20 mA HART or 0-10 V analog. The transmitter includes a local LCD display. We calibrate the DP range to your flow range before shipment.
Sourcing Legacy HVAC Hydronic Balance Elements
Legacy HVAC hydronic balance elements are not a high volume market. Many manufacturers stopped supporting these parts. Silver Automation Instruments is a flow meter manufacturer ba
We have seen customer sites in Manila and Kuala Lumpur where a failed balance element caused the chilled water flow to go unmeasured for weeks. The control system lost visibility on the secondary loop. The fix was a replacement venturi insert plus a new DP transmitter shipped by air in 5 to 7 days.
Recommended Meter Choices for HVAC Hydronic Loops
For a permanent inline replacement, choose the Silver Instruments SAV venturi flow meter. Use it when the old body is damaged or the pipe is being replaced. We quote based on DN size, flow range, pressure rating, and wetted material.
If the venturi body is still good and only the electronics failed, use the Silver Instruments SDP100 differential pressure transmitter. It accepts impulse lines and provides a square root flow output. The 4-20 mA HART signal connects to any BMS or PLC.
When you cannot shut down the line, the Silver Instruments SUF clamp-on ultrasonic flow meter gives a fast reading. It works on steel and copper pipe. Accuracy is typically ±1.0 percent of reading with clean water and no air bubbles.
How to Order a Replacement Barco Venturi Flow Meter
Send us the pipe size DN, flow range in m3/h or l/min, pressure rating, temperature range, and required output signal. A photo of the old Barco nameplate or venturi throat helps. We reply with a quote, lead time, and a data sheet.
For a specific quote, contact Silver Automation Instruments. Tel: +86-25-68650347. Whatsapp: +86-25-52155837. WeChat: +86 15365082610. You can also visit flow-meter.com.au. Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range. We will recommend either a direct venturi replacement, a DP transmitter, or a clamp-on ultrasonic flow meter.
FAQ on Barco Venturi Flow Meter Sourcing
Q: Can you supply a direct replacement for a legacy Barco venturi flow meter?
A: Yes. We machine the venturi throat to match the original ID and impulse line spacing. Send a photo of the nameplate and the pipe size.
Q: What if the venturi body is still in good condition?
A: You may only need a new DP transmitter. The Silver Instruments SDP100 works with existing impulse lines and provides 4-20 mA HART output.
Q: Which output signal is standard for building management systems?
A: Most BMS points accept 4-20 mA HART or 0-10 V analog. We configure the transmitter for square root flow output before shipment.
Q: Do you support large chilled water pipes?
A: Yes. We supply venturi meters from DN15 to DN600. Larger sizes need a custom engineering review.
Q: How fast can you ship a replacement element to Australia or Southeast Asia?
A: Stock sizes DN50 to DN200 ship in 3 to 5 business days. Custom sizes up to DN600 ship in 10 to 15 days by air freight.