『DP Type Flow Meter: Sourcing Orifice Plate Venturi and Nozzle Elements Spools』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
Sourcing DP Type Flow Meter Elements: Orifice Plate, Venturi, Nozzle and Spools
Quick Answer: Orifice plates, Venturi tubes, nozzle elements and spools are the most requested DP flow elements for steam, gas, water and chemical lines. Silver Instruments supplies machined plates, full meter runs, RTJ spools and matched DP transmitters. Send your pipe size, fluid type, pressure in bar, temperature in Celsius and flow range to get a steel or 316L quote.
DP Flow Element Types We Source
We supply four main DP flow elements for industrial flow measurement. Orifice plates cover most clean liquid, gas and steam lines from DN15 to DN600. Venturi tubes fit larger pipes and services where permanent pressure loss must stay low. Nozzle elements handle high velocity steam and high temperature gas. Spools are the straight pipe sections with flanges, plate holders and impulse taps that make site installation faster.
Orifice Plates and Meter Runs
Paddle type, universal type and RTJ type orifice plates are available. Plate thickness, beta ratio and tap layout follow ISO 5167, ASME MFC-3M and AGA 3. Common materials are 304, 316L, Monel and Hastelloy C276. Tell us the pipe schedule and flange rating. We machine the plate bore to match your flow range. Ask for a calibrated plate with a datasheet if the meter run will be used for steam custody transfer. Straight run matters more than plate material in many clean fluid meters. We also supply replacement plates, gaskets and jack screws for existing meter runs.
Venturi and Nozzle Elements
Venturi tubes reduce permanent pressure loss, so they are common in cooling water, raw water and wastewater plant discharge. We supply machined Venturi tubes from DN50 to DN800. We have supplied Venturi elements for a seawater desalination plant in the Middle East. Nozzle elements operate better than orifice plates in high velocity steam and superheated steam service. We have quoted ISA 1932 nozzles and long radius ASME nozzles for power plants in Indonesia and for a food processor in Vietnam. Standard materials include carbon steel, 316L and duplex stainless steel.
Spools and Preassembled Meter Sections
In practice, field welding of orifice flanges takes too much time. Our spools arrive with upstream and downstream pipe lengths, flanges, a thermowell port, pressure taps and the orifice plate already mounted. We follow ISO 5167 straight run requirements. Typical upstream length is 20D to 40D depending on the fitting. For a 6 inch gas line, that means 3 to 6 meters of straight spool. We also supply f
Transmitter and Accessory Pairing
Here is the thing. The DP element is only one part. We can pair it with a 4-20 mA HART differential pressure transmitter, a PT100 temperature sensor, impulse lines and a flow computer. This setup works for saturated steam, superheated steam, natural gas, compressed air and clean water. For gas metering in hazardous areas or offshore wellhead skids, ask for ATEX Zone 1 and IECEx certification. Tell us the fluid state. Gas needs pressure and temperature compensation. Liquid often does not. We can preconfigure the transmitter range from your flow data before shipping.
How to Send Us a Quote Request
Most engineers skip the brochure talk and send four things: fluid name, pipe size DN, pressure bar, and temperature in Celsius. For chemicals, add viscosity in cP. Add your flow range in m3/h or kg/h and the flange standard. Example: air, DN100, 8 bar, 25 °C, 0 to 800 m3/h, ANSI 150 RF. We return plate bore, material, spool layout, transmitter model and price. Silver Automation Instruments supplies these DP elements from our Nanjing workshop. Contact Tel: +86-25-68650347, WhatsApp: +86-25-52155837 or WeChat: +86 15365082610. You can also check the product section at flow-meter.com.au.
FAQ: Five Questions Engineers Ask Before Sourcing
Can you supply only the orifice plate without a transmitter? Yes. We supply replacement plates, plate holders, gaskets and jack screws for existing meter runs. Send the existing plate tag or bore size.
Which standard do you follow for orifice sizing? ISO 5167 for general process, AGA 3 for natural gas and ASME MFC-3M for many oil and gas lines. We state the standard on the calculation sheet.
Do Venturi tubes cost more than orifice plates? Yes, usually. For large pipes the savings in permanent pressure loss and straight run may justify the price. Ask us to quote both. The difference is often less for DN200 and above.
What is a spool in DP flow metering? A spool is a preassembled pipe section with flanges, plate holder, pressure taps and straight lengths. It saves field alignment time and reduces leakage points.
What information do you need for a steam flow meter quote? Pipe size, steam pressure in bar, steam temperature in Celsius, flow range in kg/h, and flange standard. If you do not know the pipe schedule, send the outer diameter and wall thickness.
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