Apollo Valves 523HGBKMAA0450 – POP Safety Valve, 1-1/2 x 2-1/2,450 PSI
Apollo Valves 523HGBKMAA0450 – POP Safety Valve, 1-1/2 x 2-1/2,450 PSI
Call 850-565-3492 for live factory inventory, lead times & emergency freight options.
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Ships factory-new in original packaging.
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Commercial Ordering FAQ
How do I verify that Apollo Valves 523HGBKMAA0450 – POP Safety Valve, 1-1/2 x 2-1/2,450 PSI is the correct replacement part for my equipment?
Check the OEM part number (523HGBKMAA0450) against your equipment nameplate or the manufacturer's repair parts list before ordering. If you are not sure, call the National Boiler Supply order desk at 850-565-3492 and we can cross-reference your equipment model and serial numbers before the order ships.
What are the shipping and freight options for APOLLO VALVES orders?
Standard parcel orders ship quickly from commercial distribution centers. Shipping is a $35 flat rate on orders under $999, and qualifying orders of $999 or more ship free by ground. Heavy equipment that has to move by LTL freight is quoted after the order is placed and confirmed with you before dispatch.
Can contractors or facility managers request a formal quote or use a Purchase Order (PO)?
Yes. National Boiler Supply works with commercial contractors, mechanical engineers, municipalities, and facility teams. Call 850-565-3492 for a formal quote, bulk pricing, or PO and tax-exempt order processing.
What if this APOLLO VALVES part is marked Call to Order or needed for an emergency repair?
Call our order desk at 850-565-3492. We can confirm factory lead times right away and arrange expedited air or hot-shot delivery when a repair cannot wait.
The Apollo Valves 523HGBKMAA0450 POP Safety Valve is available from National Boiler Supply. We support purchasing teams with fast dispatch, formal quotes, and a live order desk at 850-565-3492.
Product Details
POP Safety Relief Valve, Body Material Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 1/2 in, Outlet Size 2 1/2 in, Factory Set Pressure 465 psi, Pressure Range 5 to 500 psi, Disc Material 316 Stainless Steel, Overall Height 5 5/8 in, Overall Length 9 1/2 in, Seat Material Metal, Spring Material Stainless Steel, Temp. Range -320 Degrees to 422 Degrees F, Test Lever Test Lever Included, Standards CRN.
Technical Specifications
| Brand | Apollo Valves |
|---|---|
| Manufacturer Part Number | 523HGBKMAA0450 |
OEM Part Verification: Confirm Apollo Valves part number 523HGBKMAA0450 against your equipment nameplate or parts list before ordering. Our order desk can cross-check it for you.
Order Desk Support: Call 850-565-3492 for formal quotes, lead times, and volume pricing.
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
Apply for Trade Account & Terms →📋 Procurement & Shipping Notice
- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.