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King Instrument
King 7330 Series Polysulfone Rotameter
Quote on request
No online payment · add lines to RFQ BOM
Polysulfone-tube liquid rotameter. Water ~0.5–160 GPM. RFQ + engineer selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Accuracy
+/-3% FS typical; +/-5% FS for 120/150 GPM metal floats; +/-6% FS Teflon/PVDF floats
Type
King Instrument 7330 Series polysulfone-tube liquid rotameter with union ends
Tube Materials
Molded polysulfone metering tube; internals 316L SS / Teflon / PVDF / Hastelloy C-276 options
Fittings
Standard PVC or optional PVDF; vertical FNPT inlet/outlet; Viton O-ring standard
Capacity
Water about 0.5 to 160 GPM depending on float (PVDF / Teflon / metal)
Turndown Repeatability
10:1 turndown; repeatability 0.5% typical (1% some float types)
Fits liquid lines needing a King 7330 polysulfone-tube rotameter with union ends and optional reed-switch alarm.
Key advantages
- Polysulfone tube — King Instrument 7330 Series polysulfone-tube liquid rotameter with union ends
- Capacity — Water about 0.5 to 160 GPM depending on float (PVDF / Teflon / metal)
- Accuracy — +/-3% FS typical; +/-5% FS for 120/150 GPM metal floats; +/-6% FS Teflon/PVDF floats
- Turndown — 10:1 turndown; repeatability 0.5% typical (1% some float types)
- Scale — 127 mm (5 in) direct-reading detachable scale; latching reed-switch alarm option.
Typical applications
- Water and compatible liquid flow indication with polysulfone metering tubes.
- Vertical FNPT installs with PVC or PVDF union ends.
- Loops needing optional latching reed-switch alarm on the rotameter.
Selection guide
- Capacity / float — Water about 0.5 to 160 GPM depending on float (PVDF / Teflon / metal) — float material changes accuracy class.
- Fittings — Standard PVC or optional PVDF; vertical FNPT inlet/outlet; Viton O-ring standard
- P/T — PVC fittings to 130 F / 150 psig (sizes 41-72); PVDF to 200 F / 150 psig
- Internals — Molded polysulfone metering tube; internals 316L SS / Teflon / PVDF / Hastelloy C-276 options
- Options — Latching reed-switch alarm; ISA RP 16.6 certified calibrations; socket-weld ends
Common mistakes
- Picking a Teflon/PVDF float when you need ±3% FS metal-float accuracy.
- Running PVC fittings above 130 °F / 150 psig published limits.
- Assuming horizontal mount — fittings are vertical FNPT.
When to RFQ / what to tell us
- Liquid, target GPM, float material preference.
- PVC vs PVDF fittings; O-ring (Viton std); alarm yes/no.
- Quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 10150 |
| Brand | King Instrument |
| Model | 7330 Series Rotameter |
| Product type | Polysulfone Tube Rotameter |
| Type | King Instrument 7330 Series polysulfone-tube liquid rotameter with union ends |
| Tube / internals | Molded polysulfone metering tube; internals 316L SS / Teflon / PVDF / Hastelloy C-276 options |
| Fittings | Standard PVC or optional PVDF; vertical FNPT inlet/outlet; Viton O-ring standard |
| Capacity | Water about 0.5 to 160 GPM depending on float (PVDF / Teflon / metal) |
| Accuracy | +/-3% FS typical; +/-5% FS for 120/150 GPM metal floats; +/-6% FS Teflon/PVDF floats |
| Turndown / repeatability | 10:1 turndown; repeatability 0.5% typical (1% some float types) |
| Temperature / pressure | PVC fittings to 130 F / 150 psig (sizes 41-72); PVDF to 200 F / 150 psig |
| Scale | 127 mm (5 in) direct-reading detachable scale |
| Options | Latching reed-switch alarm; ISA RP 16.6 certified calibrations; socket-weld ends |
Documents
FAQ
Q: Accuracy? A: +/-3% FS typical; +/-5% FS for 120/150 GPM metal floats; +/-6% FS Teflon/PVDF floats.
Q: Turndown? A: 10:1 typical; repeatability 0.5% typical (1% some float types).
Q: What should I send for a quote? A: Liquid, flow, fittings, float, alarm, quantity.
Links
| Parameter | Value |
|---|---|
| Accuracy | +/-3% FS typical; +/-5% FS for 120/150 GPM metal floats; +/-6% FS Teflon/PVDF floats |
| Type | King Instrument 7330 Series polysulfone-tube liquid rotameter with union ends |
| Tube Materials | Molded polysulfone metering tube; internals 316L SS / Teflon / PVDF / Hastelloy C-276 options |
| Fittings | Standard PVC or optional PVDF; vertical FNPT inlet/outlet; Viton O-ring standard |
| Capacity | Water about 0.5 to 160 GPM depending on float (PVDF / Teflon / metal) |
| Turndown Repeatability | 10:1 turndown; repeatability 0.5% typical (1% some float types) |
| Temperature Pressure | PVC fittings to 130 F / 150 psig (sizes 41-72); PVDF to 200 F / 150 psig |
| Scale | 127 mm (5 in) direct-reading detachable scale |
| Options | Latching reed-switch alarm; ISA RP 16.6 certified calibrations; socket-weld ends |
| Document | King Instrument 7330 Series catalog sheet 2026 (kinginstrumentco.com) |