SANDPIPER HDF3 & HDF4 3" Santoprene Diaphragm: Santoprene, 3 in_4 in For Pump Size
SKU 3G-OTH-86881
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Frequently Asked Questions
What is the SANDPIPER HDF3 & HDF4 3" Santoprene diaphragm used for?
This Santoprene diaphragm is a replacement part for Sandpiper HDF3 and HDF4 air-operated double-diaphragm pumps. It is used in industrial fluid-handling applications such as chemical transfer, wastewater treatment, and mining, where abrasion resistance and flexibility are required.
What are the specifications of the SANDPIPER HDF3 & HDF4 3" Santoprene diaphragm?
The diaphragm is made of Santoprene, fits pump sizes 3 in and 4 in, and comes in a pack of 2. The manufacturer part number is 286.018.354. It is designed for Sandpiper HDF3 and HDF4 pumps, offering durability in demanding pumping environments.
Where to buy SANDPIPER HDF3 & HDF4 3" Santoprene diaphragm worldwide?
3G Electric supplies the SANDPIPER HDF3 & HDF4 3" Santoprene diaphragm worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.
How to install the SANDPIPER HDF3 & HDF4 Santoprene diaphragm?
To install, first isolate the pump and relieve pressure. Remove the pump's outer chamber bolts and separate the chambers. Replace the old diaphragm with the new Santoprene one, ensuring proper alignment. Reassemble and torque bolts to manufacturer specifications. Always follow Sandpiper's service manual.
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Common applications for SANDPIPER HDF3SANDPIPER HDF3 Products
3G Electric supplies SANDPIPER HDF3 sandpiper replacement diaphragms. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.





