S305-75 Westwood Observation Port – REF OBS-75, 3/4” NPT

The S305-75 Westwood Observation Port (Ref. No. OBS-75) is a heavy-duty sight port designed to provide safe, clear visual inspection of flame or internal process conditions in high-pressure and high-temperature applications. Featuring a clear soda-lime glass window and male 3/4” NPT pipe thread mounting, this observation port is commonly used in industrial combustion and process systems where reliable visual access is required.

✅ Key Features

• ✅ Westwood REF OBS-75 observation / sight port

• ✅ 3/4” male NPT pipe thread connection

• ✅ Clear soda-lime glass window for excellent visibility

• ✅ Rated for working pressures up to 3,000 PSI

• ✅ Suitable for high-temperature service up to 500°F

• ✅ Ideal for flame viewing and process inspection

• ✅ Rugged, compact design for demanding applications

📋 Specifications

🔄 Cross Reference Table

⚠️ Common Symptoms Indicating Replacement

• Cracked, clouded, or damaged viewing glass

• Leaks at the threaded connection

• Reduced visibility of flame or internal process

• Physical damage from pressure or heat cycling

❓ Frequently Asked Questions (FAQ)

Q: What is this observation port used for?
A: It allows safe visual inspection of flame or process conditions without system disassembly.

Q: Is this compatible with standard pipe fittings?
A: Yes, it features a standard 3/4” NPT male thread.

Q: Can this be used in high-pressure systems?
A: Yes, it is rated for up to 3,000 PSI when installed correctly.

Q: What temperature can it handle?
A: This observation port is suitable for applications up to 500°F.

🛒 Shopping Tips

• Confirm 3/4” NPT thread size before ordering.

• Use thread sealant rated for high temperature and pressure.

• Inspect window clarity during routine maintenance.

• Replace immediately if the glass shows cracks or clouding.