

4" Vessel Closure (Universal, Top & Bottom Use)
✅ In large vessels, a dual-flange design is common — one for a control valve on top, and a bottom port for drainage or servicing.
Description ...
4" Vessel Closure (Universal, Top & Bottom Use)
⚙️ Purpose:
✅ The 4" closure is designed to hermetically seal top or bottom openings in pressure vessels used in water treatment systems.
✅ In large vessels, a dual-flange design is common — one for a control valve on top, and a bottom port for drainage or servicing.
????️ Use cases include:
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Sealing unused or spare vessels
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Covering bottom openings in dual-port systems
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Protecting vessels during transport or storage
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Temporary sealing during retrofits or equipment delays
✔️ Specifications:
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Compatibility: all vessels with 4" threaded ports (top or bottom)
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Thread type: 4" internal NPSM
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Material: durable engineering plastic, chemical-resistant
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Included: closure cap only (O-ring not included)
✔️ Advantages:
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Universal fit for top and bottom use
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Reliable seal, even under pressure
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Tool-free installation