116337-011 Armstrong Casing
The Armstrong 116337-011 is a replacement cast-iron casing designed for vertical motor-mounted “B-size” Armstrong pumps in the H51, H52, H53 series. This casing is part of the “B” frame for Series-4360 vertical pumps and supports standard 3/8-inch impeller bore, 1/2-inch mechanical seal setups. It serves as the volute body in which the pump’s impeller turns, providing the sealed chamber for fluid flow and mechanical integrity
Casing for H51, H52, H53 CI
Armstrong 116337-011 Cast-Iron Pump Casing for H51 / H52 / H53 CI Vertical Pumps (B-Size)
Overview
The Armstrong 116337-011 is a replacement cast-iron casing designed for vertical motor-mounted “B-size” Armstrong pumps in the H51, H52, H53 series. This casing is part of the “B” frame for Series-4360 vertical pumps and supports standard 3/8-inch impeller bore, 1/2-inch mechanical seal setups. It serves as the volute body in which the pump’s impeller turns, providing the sealed chamber for fluid flow and mechanical integrity
Key Features & Benefits
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OEM Armstrong part ensuring correct fit for H51, H52, H53 pump line “B-size” casings.
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Cast-iron construction for strength, durability, and resistance to wear and corrosion in standard industrial use
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Supports pump frames with 3/8-inch impeller bore and 1/2-inch mechanical seal in “B-size” vertical pump config.
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Compact and lightweight ~4 lbs — easier handling and installation.
Technical Specifications
| Specification | Detail |
|---|---|
| Brand / OEM | Armstrong |
| Part Number | 116337-011 |
| Material | Cast Iron |
| Compatible Pump Series | Armstrong H51, H52, H53 series (“B” frame, CI) |
| Pump Configuration | Vertical, motor-mounted, “B” size |
| Impeller Bore | 3/8-inch (for “B” designation) |
| Mechanical Seal Size | 1/2-inch mechanical seal |
Applications
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Replacement casing in Armstrong vertical pumps in H51 / H52 / H53 series when original volute is damaged or corroded.
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Used in hydronic, boiler feed, or pump systems where the cast-iron “B” frame pump is employed.
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OEM maintenance & rebuild applications to restore pump performance and prevent leaks.
Installation & Best Practices
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Confirm pump frame (“B” size) and model series H51 / H52 / H53 match before ordering to ensure fit.
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When replacing casing, clean mating surfaces thoroughly and inspect mechanical seal condition.
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Use proper gasket, seal, O-rings per Armstrong’s spec for seal assembly.
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Torque bolts evenly to avoid distortions. Monitor for leaks or vibration after installation.
Why Buy From Apex Controls
Apex Controls provides authentic Armstrong 116337-011 casings—OEM-grade parts with verified specifications. Get the right fit, fast delivery, and parts that restore Armstrong pump reliability.
| Weight | 4 lbs |
|---|---|
| Dimensions | 2 × 2 × 2 in |
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