Description

ARO Diaphragm Fluid Transfer Pump, 1/2", Air Operated, 12 GPM (Stainless & Santoprene)

The ARO Diaphragm Fluid Transfer Pump is an air-operated double-diaphragm pump designed for reliable, high-volume fluid transfer even at low air pressure. Its 1/2" NPT fluid connections and Santoprene diaphragms support dependable pumping performance across demanding laboratory and fluid-handling applications.

This ARO double-diaphragm pump uses pressure differences between the air chambers to alternately create suction and positive fluid pressure in the fluid chambers. Ball checks help maintain positive fluid flow, while the lube-free differential valve design on the major air valve and Simulshift™ pilot valve supports reliable, low-maintenance operation.

Drop Shipped: This item is drop shipped directly from our supplier. Please call for current lead time before ordering. For best operation, an air compressor supplying 8 CFM or more is recommended.

Air Operated Double Diaphragm Up to 14 GPM Santoprene Diaphragm

High-Volume Transfer: Up to 14 GPM maximum flow — supports efficient fluid movement for demanding transfer applications.

Air Operated: Pneumatic double-diaphragm operation — provides dependable pumping without requiring an electric motor at the pump.

Lube-Free Operation: Differential valve and Simulshift™ pilot valve design — helps provide reliable operation with reduced lubrication requirements.

Why buy from USA Lab

Expert Support
Engineers & technicians on staff.

Quality First
Tested and trusted products.

Fast Fulfillment
Nationwide 1-2 day shipping.

Warranty & Parts
US-based service & spares.

Why this ARO Diaphragm Fluid Transfer Pump?

Double-diaphragm design — alternates suction and positive fluid pressure to support consistent fluid transfer.
High flow capability — delivers up to 14 GPM maximum flow for high-volume transfer requirements.
Low-pressure air operation — designed to provide high-volume delivery while helping minimize air consumption.
Santoprene wetted components — Santoprene diaphragms and balls provide durable materials for fluid-handling applications.
Ball check valves — help maintain positive fluid flow through the pump.
Lube-free valve design — the major air valve and Simulshift™ pilot valve support worry-free operation without routine lubrication.

Talk to an expert

Get product guidance, application support, and compatibility information for your fluid-transfer workflow. This pump is drop shipped from our supplier, so please contact us for current lead time before ordering.

Call 734-855-4890

Technical Specifications

Specification	Details
Product Type	Double Diaphragm Pump
Pump Operation Type	Air Operated
Maximum Flow	14 GPM
Maximum Temperature	150°F
Housing Material	Polypropylene
Inlet / Outlet Size	1/2"
Connection Style	NPT
Air Inlet Size	1/4" FNPT
Diaphragm Material	Santoprene®
Agency Compliance	CE, REACH, RoHS
Valve Type	Ball
Maximum Operating Pressure	100 psi
Ball Material	Santoprene®
Check Seat Material	Polypropylene
Maximum Diameter Solids	3/32"
Manifold Connection	Multiport
Dimensions (L × W × H)	13.75" × 7.5" × 11.625"
Self-Priming	10 ft dry / 15 ft wet
Manufacturer Warranty	5 years

Popular Industries & Use Cases

Fluid Transfer Pharmaceutical Processing Chemical Processing Laboratory Research

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FAQ

What type of pump is the ARO Diaphragm Fluid Transfer Pump?

The ARO Diaphragm Fluid Transfer Pump is an air-operated double-diaphragm pump designed for fluid transfer. It uses pressure differences in the air chambers to alternately create suction and positive fluid pressure in the fluid chambers.

What is the maximum flow rate of the ARO Diaphragm Fluid Transfer Pump?

The ARO Diaphragm Fluid Transfer Pump has a maximum flow rate of 14 GPM. The product title identifies the pump as a 12 GPM model, while the provided technical specifications list 14 GPM as the maximum flow.

What air compressor is recommended for the ARO Diaphragm Fluid Transfer Pump?

An air compressor supplying 8 CFM or more is recommended for the ARO Diaphragm Fluid Transfer Pump.

What materials are used in the ARO Diaphragm Fluid Transfer Pump?

The pump housing is specified as polypropylene, while the diaphragms and balls are made from Santoprene®. The assembled pump package also includes stainless-steel fluid-handling fittings and valves as listed in the packing list.

Important Shipping Notice!

DISCLAIMER:

This item is drop shipped directly from our supplier. Please call us before ordering to confirm the current supplier lead time.

All items are carefully packaged to ensure safe delivery. In the rare event that your item arrives damaged, please notify us within 3 days of receipt. We will promptly provide a replacement or issue a refund.

Please note that any damage occurring after delivery is not covered under warranty. We appreciate your understanding and your trust in our products.

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We’ll get you answers fast, including supplier lead-time information for this drop-shipped pump.

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Specifications

Brand:	ARO
Pump Operation Type:	Air Operated
Max. Flow:	12 GPM
Max. Operating Pressure:	100 psi
Temperature Range:	-40°C to 107°C
Housing Material - Pumps:	Aluminum
Inlet/Outlet Size:	1/2 in
Diaphragm Material - Pumps:	Santoprene(R)
Agency Compliance:	CE, REACH, RoHS
Warranty Term:	1 Year
Return Window:	30 days
Lead Time:	1–3 Days

Warranty

ARO Warranty Policy

Ingersoll Rand® / ARO® currently warrants to the original use purchaser of the Ingersoll Rand / ARO Piston Pumps-manufactured products depicted in this catalog that Ingersoll Rand / AROPiston Pumps will repair or replace free of charge, including return shipping costs within the continental United States of America, any such product which under normal use and service proves defective in material or workmanship, as determined by ARO Inspection, within five (5) years from the date of purchase, provided the claimed defective product or thereof is promptly returned to the Ingersoll Rand / ARO Piston Pumps factory or Customer Service Center with transportation charges prepaid.

If Ingersoll Rand / ARO Piston Pumps inspection discloses no defect in material or workmanship, repair or replacement and return will be made at customary charges.

The foregoing warranty supersedes, voids, and is in lieu of all or any other warranties, express or implied, and no warranty of merchantability or fitness for particular purpose is intended or made. The sole obligation of Ingersoll Rand / ARO Piston Pumps and the original-use purchaser’s sole remedy is as stated above, and in no event shall Ingersoll Rand / ARO Piston Pumps be liable for any special, direct, indirect, incidental, consequential, or other damages or expenses of any nature including, without limitation, loss of profits or production time incurred by the original-use purchaser or any other party.

Shipping & Returns

1–3 Business Days Standard Processing

Return Policy ↗ Varies by Product Warranty Policy ↗ Varies by Product

3 Days to Claim Inspect on Arrival

Shipping

Orders ship within 1–3 business days after payment clears. We ship Monday through Friday via UPS, USPS, and freight carriers.
Freight items (crated, hazmat, dropship, or special packaging) can take 1–5 business days to ship.
Expedited shipping speeds up transit, not processing. Contact us for true rush orders.
PO Box addresses ship USPS. Alcohols, chemicals, and hazmat cannot ship to a PO Box.

Full Shipping Policy

Delivery & Damage Claims

Inspect every shipment on arrival. Claims must be filed within 3 business days.
Visible damage? Refuse the delivery and have the driver document it. We will file the claim and ship a replacement.
Concealed damage: contact us within 2 days with photos of the packaging and item. Keep all packing materials.
Freight services (liftgate, residential, inside delivery) are the customer's responsibility to select for their location.

Damage & Freight Details

Returns

USA Lab branded products are returnable within 30 days of order date with prior authorization. Email us before sending anything back.
Solvents, chemicals, and consumables are not returnable once shipped. Custom and made-to-order items are final sale.
Unused items in original packaging carry a 15% restocking fee. Defective items ship back on us.
Items showing any signs of use, wear, contamination, or modification are not eligible for return.
Glassware damage must be reported within 3 business days of delivery for replacement or refund.

Full Return Policy

Custom & Made-to-Order Items

Customized and made-to-order products are final sale and not eligible for return under any circumstances.
This includes ductless fume hoods, configured tanks and reactors, and any item built to your specifications.
These products are manufactured specifically for your application. Confirm sizing, voltage, and configuration with our team before ordering.
Damage claim coverage still applies. Inspect on arrival and report issues within 3 business days.

Return Eligibility Details

Warranty

USA Lab products are covered against manufacturing defects for up to 3 years, depending on product line.
1 year: chillers, heaters, rotovaps, reactors, vacuum ovens, mixers, and most equipment. 2 years: UVP vacuum pumps. 3 years: scientific freeze dryers.
Wear items (glassware, gaskets, heating elements, sensors) and fittings/steel are not covered. Report defects within 30 days (3 days for glass).
Non–USA Lab brands are covered by their manufacturer's warranty. See the product's Warranty tab.

Full Warranty Policy

International Orders

Import duties, taxes, VAT, and brokerage fees are not collected by USA Lab and are the receiver's responsibility.
Verify your country's customs charges and import restrictions before ordering.
Refused or unclaimed international shipments are refunded minus shipping and a 15% restocking fee.
International orders are generally non-returnable. Damaged items must be reported within 3 business days.

International Guidelines

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Summaries above are provided for convenience. The full Policies & Warranty Info pages govern all orders and may be updated at any time.

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ARO Diaphragm Fluid Transfer Pump, 1/2" , Air Operated, 12 GPM (Constructed of Stainless & Santoprene)

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