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Refrigerant Flow Meter Supplier China: Sourcing Cost-Effective High-Performance Hardware
Quick Answer
Silver Automation Instruments supplies refrigerant flow meters from China at factory-direct prices without sacrificing measurement accuracy. We recommend Coriolis mass flow meters for liquid refrigerants like R134a, R410A, and ammonia. The cost is 30% to 50% lower than European equivalents and delivery takes 2 to 4 weeks for standard DN10–DN80 units.
What Makes a Refrigerant Flow Meter Hard to Get Right
Refrigerants come with a set of measurement challenges that standard water meters cannot handle. Liquid refrigerants like R22, R404A, and R1234ze often have low viscosity and high vapour pressure. A small pressure drop across the meter can cause flashing. Once gas bubbles form inside the measuring tube, the reading jumps by 15% or more. Our engineers have seen this happen on a test bench in Surabaya last year. The customer replaced a turbine meter with our SLW series Coriolis meter and the problem disappeared overnight.
Temperature extremes also play a role. Ammonia refrigeration systems in cold storage facilities run at -40 °C in the low-pressure line. Standard electronics freeze up fast. We use a remote transmitter design with PT100 sensor elements rated for -50 °C to 200 °C. The flow tube is stainless steel 316L, which handles R717 ammonia without corrosion issues.
Coriolis Mass Flow Meters for Refrigerant Filling and Batching
Most refrigerant distributors in Southeast Asia and the Middle East need a meter that gives a direct mass reading in kg or tonnes. Coriolis technology is the natural choice. Our SLW Coriolis series works with refrigerant densities from 0.5 kg/L to 1.8 kg/L without recalibration. Accuracy is ±0.2% of rate for liquids. Repeatability sits at ±0.05%. This matters when you fill cylinders of R290 propane or R600a isobutane and every gram counts for safety compliance.
Here is the thing. Many small cylinder filling stations in Nigeria and Pakistan use load cells. Load cells need regular calibration and a level floor. A Coriolis meter from Silver Instruments costs a bit more upfront but removes those daily headaches. We shipped 47 SLW-15 meters to a refrigerant blender in Ho Chi Minh City last quarter. They run 4-20 mA HART signals directly to a PLC and batch 12 kg cylinders in 18 seconds each. The local integrator set it up in half a day.
Pricing and Lead Times That Fit SME Budgets
We see too many quotes from European suppliers with a base price of USD 4,200 for a DN15 Coriolis meter and a 10-week lead time. A small refrigeration contractor in Kenya or Peru cannot swallow that. Silver Instruments DN15 Coriolis refrigerant meter starts at USD 1,680 Ex-Works Nanjing. DN25 is around USD 2,150. Prices shift with process connections (tri-clamp, flange ANSI 150, or NPT) and whether you need ATEX Zone 2 certification for ammonia environments. Contact us with your refrigerant type, flow range in kg/h, pipe size DN, and pressure rating. We usually reply within 4 hours during business days.
Standard shipment is DHL or FedEx for units under 30 kg. For larger orders, sea freight to Santos, Mombasa, or Jebel Ali takes 18 to 25 days. Every meter comes with a 2-year warranty and a calibration certificate traceable to national standards.
Why Not Use a Vortex or Turbine Meter on Refrigerant
We have tested this on our own rig. A vortex meter needs a minimum Reynolds number to shed vortices properly. Low-viscosity refrigerants at low flow rat
Our vortex meters work fine for cooling water loops and chilled water return lines. For refrigerant service, we offer a dedicated SLW-Micro Coriolis with a flow range of 0 to 200 kg/h. It handles R513A and R134a charge verification with a measurement error under 0.1 kg per charge cycle. A car air-conditioning service chain in Bangkok installed 22 of these micro meters last year and cut refrigerant waste by 8%.
How to Specify a Refrigerant Flow Meter in 5 Steps
Step one is fluid name and phase. Most refrigerant meters measure liquid phase only. If you need to meter vapour or two-phase flow, tell us upfront. Step two is flow range in mass units. Do not use volumetric units like L/min because refrigerant density changes with temperature. Step three is process connection type and size. Common requests are ½ inch NPT male, Tri-clamp 1.5 inch, or DN20 PN40 flange. Step four is output signal. 4-20 mA with HART is the factory default. Pulse output and Modbus RTU are available at no extra cost. Step five is hazardous area requirement. For ammonia cold storage in the Gulf, ATEX Zone 1 or Zone 2 certification is mandatory.
Send us these five data points: refrigerant name, minimum and maximum flow rate (kg/h), pipe size, signal preference, and classification zone. Our application engineer will propose a model within one working day.
FAQ
Can I use an electromagnetic flow meter for refrigerant?
No. Electromagnetic flow meters require a conductive fluid. Most refrigerants are non-conductive oils or halocarbons. This meter type will read zero flow even when the pump is running.
What is the smallest flow rate you can measure on R290 propane?
With our SLW-Micro Coriolis sensor, the minimum measurable flow is 0.5 kg/h for liquid propane. Repeatability at this low end is ±0.02 kg/h after zero point calibration. We test this range with a NIST-traceable master meter before shipping.
Do you offer local support in Mexico or Brazil?
We have Portuguese and Spanish speaking technical staff based in Nanjing who handle WhatsApp and video call support. For on-site commissioning, we partner with a local industrial automation service company in Monterrey and São Paulo. Travel and daily rates are billed separately.
How do you guarantee calibration accuracy for mixed refrigerants?
We calibrate each Coriolis meter on a gravimetric rig using a reference fluid with density and viscosity close to the target refrigerant blend. For R410A, we use a hydrocarbon mix that mimics its density of 1.06 kg/L at 25 °C. The calibration certificate lists the rig uncertainty of ±0.05% mass.
What is the lead time for ATEX certified refrigerant meters?
Standard ATEX Zone 2 (Ex ec) meters ship in 15 working days. Zone 1 (Ex db) flameproof versions need 30 working days because the enclosure machining and certification paperwork take longer. Plan for this delay and order early to avoid refrigerant line downtime.
Contact Silver Automation Instruments
Email: [email protected]
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
We respond to refrigerant flow meter inquiries with a full quotation and dimensional drawing within one working day.
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