Dixon
HSG-POLY-600 - Replacement Sight Insert for HSG-Series Sight Glass
- SKU:
- HSG-POLY-600
- Availability:
- Usually Ships Same Day
- Weight:
- 2.00 LBS
Description
Dixon HSG-POLY-600 Replacement Sight Insert - 6" HSG-Series
Dixon HSG-POLY-600 is a 6" replacement polycarbonate sight insert designed for compatible Dixon HSG-Series Sight Glass assemblies.
This replacement insert restores the transparent viewing section of an HSG-Series sight glass, allowing operators to visually monitor product flow, clarity, color, or process conditions without replacing the complete sight glass assembly. Dixon identifies HSG-POLY-600 as the replacement polycarbonate insert for the 6" HSG size.
Product Highlights
- Genuine Dixon replacement sight insert
- Manufacturer part number HSG-POLY-600
- Designed for Dixon HSG-Series Sight Glass assemblies
- Fits 6" HSG-Series size
- Polycarbonate construction
- Transparent viewing component
- Replacement for damaged, worn, scratched, or clouded sight inserts
- Allows continued visual monitoring of process flow
- Replacement insert only
- Quantity required per 6" HSG assembly: 1
Technical Specifications
| Brand | Dixon |
|---|---|
| Manufacturer Part Number | HSG-POLY-600 |
| Product Type | Replacement Sight Insert |
| Series | HSG-Series |
| HSG Size | 6" |
| Material | Polycarbonate |
| Quantity per Assembly | 1 |
| Application | Replacement viewing insert for compatible Dixon HSG-Series Sight Glass assemblies |
Polycarbonate Sight Insert
The HSG-POLY-600 is manufactured from transparent polycarbonate and serves as the visual inspection section within the HSG-Series sight glass assembly.
Polycarbonate provides a clear viewing surface while offering useful impact resistance for compatible sanitary and process applications.
Because chemical compatibility and temperature exposure can affect transparent polymer components, always confirm that polycarbonate is suitable for the process fluid, cleaning chemicals, operating temperature, and sanitation procedures used in the system.
Designed for the 6" HSG-Series Sight Glass
Dixon's HSG-Series includes sight glass assemblies in multiple tube sizes. The HSG-POLY-600 is specifically identified for the 6" HSG size and should not be substituted for smaller HSG-POLY inserts.
The complete 6" HSG-Series sight glass assembly uses a polycarbonate viewing section together with stainless steel components and the appropriate gasket configuration for the selected valve model. Dixon lists 6" HSG assemblies with EPDM, FKM, and PTFE gasket options.
When to Replace the Sight Insert
Visual Condition
- Clouding or loss of transparency
- Deep scratching
- Cracking
- Crazing or stress marks
- Surface damage that limits process visibility
Maintenance Conditions
- Damage found during inspection
- Chemical attack or discoloration
- Impact damage
- Wear discovered during gasket replacement
- Scheduled preventive maintenance
HSG-Series Replacement Components
Dixon supports the HSG-Series with separately available replacement components, including polycarbonate sight inserts and gasket kits.
For the 6" size, Dixon lists HSG-POLY-600 as the replacement polycarbonate insert and HSG-RKP600 as the PTFE gasket kit. Additional gasket components are also listed for 6" HSG assemblies using EPDM or FKM configurations.
Confirm the gasket material used in the existing sight glass before ordering replacement sealing components.
Installation & Maintenance
Before servicing the sight glass, completely isolate the affected section of the process system and relieve all internal pressure. Drain, clean, and decontaminate the assembly as required by the process media and facility procedures.
Disassemble the HSG-Series sight glass according to Dixon's maintenance instructions. Carefully remove the existing polycarbonate insert and inspect the mating surfaces, clamps, gaskets, and stainless steel components for wear, contamination, or physical damage.
Install the HSG-POLY-600 in the proper orientation with compatible sealing components. Avoid scratching, gouging, or applying uneven force to the polycarbonate insert during assembly.
Reassemble the sight glass using the appropriate gasket and clamp arrangement. Verify correct alignment before tightening or returning the assembly to service.
After installation, inspect the assembly for leakage and confirm that the transparent viewing section is properly seated.

Our team can help confirm your HSG-Series size, sight insert, gasket material, and other replacement components before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What size sight glass does Dixon HSG-POLY-600 fit?
HSG-POLY-600 is the replacement polycarbonate sight insert for the 6" Dixon HSG-Series Sight Glass.
What material is HSG-POLY-600?
Dixon identifies the replacement insert material as polycarbonate.
Is HSG-POLY-600 a complete sight glass?
No. HSG-POLY-600 is the replacement sight insert only. It is not the complete HSG-Series sight glass assembly.
How many inserts are used in the 6" assembly?
Dixon's HSG-Series reference guide lists one polycarbonate insert for the 6" HSG assembly.
What is the purpose of the insert?
The transparent polycarbonate insert provides the viewing section that allows operators to visually monitor process fluid through the HSG-Series sight glass.
Does the insert include replacement gaskets?
No. Replacement gasket components are listed separately by Dixon.
What PTFE gasket kit is used with the 6" HSG-Series?
Dixon lists HSG-RKP600 as the 6" PTFE gasket kit.
Are other gasket materials available?
Yes. Dixon's 6" HSG-Series assemblies are available with EPDM, FKM, and PTFE gasket configurations.
When should the polycarbonate insert be replaced?
Replacement may be appropriate if the insert is cracked, heavily scratched, clouded, chemically attacked, or otherwise damaged in a way that affects visibility or safe operation.
What should I verify before ordering?
Confirm that the existing assembly is a 6" Dixon HSG-Series Sight Glass and that HSG-POLY-600 is the required replacement insert. Also verify gasket material and chemical compatibility with the process.
Important Ordering & Installation Notes
- This listing is for Dixon part number HSG-POLY-600.
- Designed for the 6" Dixon HSG-Series Sight Glass.
- Material is polycarbonate.
- This listing is for the replacement sight insert only.
- Complete sight glass assembly is not included.
- Replacement gaskets are not included unless specifically stated.
- Dixon lists one polycarbonate insert per 6" HSG assembly.
- Confirm HSG-Series size before ordering.
- Do not substitute a different HSG-POLY size.
- Verify polycarbonate compatibility with the process fluid and cleaning chemicals.
- Verify operating temperature and process conditions before installation.
- Always isolate and fully depressurize the piping system before servicing the sight glass.
- Drain and clean the assembly as required before disassembly.
- Inspect gaskets and mating surfaces during service.
- Do not install an insert that is cracked, deeply scratched, crazed, or otherwise damaged.
- Protect the transparent surface from scratches during installation.
- Use the correct gasket material for the existing HSG-Series configuration.
- Follow applicable Dixon maintenance and assembly procedures.
- Inspect the completed assembly for leakage before returning the process system to normal service.