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GRACO Diaphragm Pump D54311
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Air Inlet Thread Gender Female
Air Inlet Thread Type NPT
Application Industrial
Connection Type Threaded
Diaphragm Compatible Material Buna
Diaphragm Material Buna
Fluid Inlet Size (in) 3/4
Fluid Inlet Thread Type BSPT
Fluid Outlet Size (in) 3/4
Fluid Outlet Thread Type BSPT
Fluid Section Material Aluminum
Manifold Configuration Center Port
Material Aluminum
Maximum Air Consumption (SCFM) 28
Maximum Air Pressure (MPa) 0.7
Maximum Air Pressure (psi) 100
Maximum Cycle Rate (CPM) 400
Maximum Flow Rate (GPM) 16
Maximum Fluid Pressure (MPa) 0.7
Maximum Fluid Pressure (psi) 100
Maximum Operating Temperature (°F) 225
Maximum Solid Size (in) 0.09375
Minimum Operating Temperature (°F) 40
Overall Height (in) 10.43
Power Source Air
Why Global Buyers Choose O&Kmarts
- Access to a wide range of SKUs across multiple brands and series
- One RFQ connects you to 5,000+ global supplier quotes
- Better availability for urgent and hard-to-find parts
- Faster global delivery via FedEx / DHL / UPS
- Easier access to rare and high-value models
- Flexible sourcing for individual parts or complete solutions
- Lower MOQs and more adaptable buying options
- Multi-brand procurement in one order
- OEM replacement and alternative model solutions available
- Fewer intermediaries, ensuring more competitive pricing
Why Global Buyers Choose O&Kmarts
- Limited to fast-moving SKUs only
- Limited local market availability
- Inventory frequently fails to meet urgent demand
- Long replenishment cycles, often taking weeks
- Rarely stock high-value compressors (e.g. Copeland YHV119)
- Frequently require bundled purchases
- Rigid and difficult MOQ negotiations
- Limited brand selection
- Minimal or no customization capability
- Higher local distribution and markup costs
Top Questions from OKmarts Buyers
Q: Is there a warranty provided on industrial parts, and how is the RMA (Return Merchandise Authorization) process handled?
A: All new and original industrial parts carry a standard 12-month factory warranty. If a component fails or shows defects within the warranty period, buyers can initiate an RMA request through our platform, which prompts our team to coordinate testing, repair, or replacement directly with the manufacturer.
Q: Are the products listed on OKmarts sourced from the gray market or unauthorized liquidation stock?
A: No. Unlike surplus liquidation brokers who sell unpredictable, unvetted excess inventory, OKmarts builds strategic partnerships directly with active factory supply chains and authorized distribution channels. This ensures that every component is fully traceable, factory-fresh, and covered by standard manufacturer liability frameworks.
Q: How does OKmarts ensure consistent communication across different global time zones?
A: We operate an international sales and support desk that covers major global operating hours. Every corporate buyer is assigned a dedicated Account Manager who coordinates cross-border communications, ensuring that urgent technical queries or logistics issues are answered regardless of the time difference.
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Q&A
Q: Can I request a specific delivery date for my order?
A: While we strive to deliver orders promptly, specific delivery date requests may not always be possible due to logistics and carrier limitations. However, if you have a specific requirement or need expedited shipping, please contact our customer service, and we will do our best to assist you.
Q: How can I view the average rating and user reviews for a product?
A: On the product details page, you can view the average rating and user reviews. We encourage users to share their shopping experiences and provide feedback, so you can better understand the opinions and suggestions of other buyers.
Q: Does the platform support cash on delivery?
A: Depending on the region and order amount, we may support cash on delivery. On the checkout page, if cash on delivery is available as one of the options, you can choose this payment method to complete the order.







