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Brooks 1350 Flow Meter: Sourcing Glass Variable Area Rotameter Sizing Sheets
Quick Answer: A Brooks 1350 glass variable area rotameter quote depends on flow range, media, pressure, temperature, and process connection. Silver Instruments supplies equivalent glass tube rotameters with sizing sheets for water, air, chemical dosing, and gas purge lines. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range and we will return a datasheet plus price within 24 hours.
Why a Sizing Sheet Beats a General Quote
Most engineers skip this part. They ask for a rotameter price without defining the operating conditions. That creates a quote that looks cheap in the first email and costs more later because the tube, float, or seal material is wrong. Glass variable area rotameters are simple instruments. The difference between a working installation and a broken tube is usually one missing sizing parameter.
For a Brooks 1350 size glass tube flow meter, the sizing sheet captures the data that determines tube length, scale range, float shape, and connection type. Without that data, you will receive a generic model. In practice, a generic model may still work for water at 25 °C and low pressure. It will not survive hot caustic dosing or high purity gas lines.
Brooks 1350 Glass Variable Area Rotameter Data You Need
A typical sizing sheet for this class of rotameter includes media, flow range, pressure, temperature, viscosity, density, and connection size. For a Brooks 1350 style glass tube rotameter, common liquid ranges run from 0.1 L/h to 1500 L/h depending on tube size. Gas ranges often run from 0.02 L/min to 1800 L/min at standard conditions. Accuracy is usually plus or minus 2 percent to 5 percent of full scale. Repeatability is around plus or minus 0.5 percent. Maximum glass tube pressure is often 10 bar at 20 °C. Some shielded versions go higher.
Process connections matter more than buyers expect. A 1/4 inch NPT connection is common for low flow lab or purge use. A DN15 or DN25 connection fits small skid piping. Wetted materials in the Silver Instruments glass rotameter replacement include borosilicate glass, stainless steel 304 or 316, PTFE, FKM, and EPDM. That covers water, air, weak acids, mild alkalis, and many process gases.
Direct Replacement Options for Brooks 1350 Glass Rotameters
Silver Instruments does not claim to be the original Brooks manufacturer. We supply a glass variable area rotameter replacement series that matches common tube lengths, scale formats, and process connections used on Brooks 1350 installations. The benefit for a maintenance engineer is simple. You can keep the same panel cutout and process piping in most cases. You send us the old nameplate data or a photo. We check the tube length, float material, connection, and scale range against our sizing sheet.
We export these rotameters to water plants in Malaysia, chemical dosing skids in Vietnam, gas sampling panels in Australia, and food and beverage lines in Mexico. The most common request is a 150 mm or 250 mm tube length with a stainless steel float and needle valve. We also see 304 stainless steel inlet and outlet fittings on a 1/2 inch NPT body.
How to Send Us a Complete Sizing Request
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Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. Add a photo of the old Brooks 1350 nameplate if this is a replacement. Our engineers will return a sizing sheet with the recommended glass rotameter model, tube length, float material, valve type, and accuracy statement. That same email will include price and lead time. No generic catalog link. No follow up marketing call.
Contact Silver Automation Instruments: Tel +86-135-1213-1526, WhatsApp 86-135-12131526, WeChat +86 13512131526. Website flow-meter.com.au.
Customer Example: Chemical Dosing Skid in Vietnam
Last year a water treatment contractor in Ho Chi Minh City needed 14 glass rotameters for ferric chloride and sodium hydroxide dosing. The original Brooks 1350 units were imported years ago. The operator had no sizing sheets. We checked the tube length and float material from a photo. Ferric chloride required PTFE seats and a ceramic float. Sodium hydroxide required 316 stainless steel fittings and EPDM seals. The order shipped within 12 days. The replacement rotameters matched the existing panel holes. The contractor kept one spare for each skid.
This is the reason we ask for photos and a simple duty description. Rotameter replacement is not only about flow range. It is about chemical compatibility and the connection standard on the skid.
FAQ
What flow range should I specify for a Brooks 1350 equivalent?
Give the normal flow first. Then give the minimum and maximum. A range of 10 to 100 L/h water is more useful than only saying 100 L/h. Glass rotameters have about a 10 to 1 turndown.
Can Silver Instruments provide a sizing sheet before a quote?
Yes. Send us your media, flow range, pressure, temperature, and connection size. We return a model number, tube length, scale range, wetted material, valve option, and accuracy statement within 24 hours.
Are the replacement glass tubes interchangeable with Brooks 1350 units?
In many cases yes for common tube lengths and connections. We need the old nameplate photo or dimensions. Not every OEM option is interchangeable, so we verify before quoting.
What industries use glass variable area rotameters?
Water treatment, chemical dosing, gas purge, food and beverage, desalination plants, and laboratory sample systems. We supply these markets in Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
How do I avoid tube breakage with a glass rotameter?
Avoid thermal shock, pressure spikes, and incorrect installation. Select the right seal material and use a metal shield if the rotameter sits in a high traffic area. We can add a shield on request.
Contact Silver Automation Instruments for a Brooks 1350 equivalent glass rotameter sizing sheet. Tel +86-135-1213-1526, WhatsApp 86-135-12131526, WeChat +86 13512131526. Website flow-meter.com.au.