We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
RANCO Sight Glass: Brass - Sweat Connection Sight Glasses
RANCOSweat Connection Sight Glasses

RANCO Sight Glass: Brass

The RANCO Sight Glass is a sweat connection sight glass made of brass, with a length of 5 3/4 inches. This RANCO product, model RSG-4S, is designed for visual flow indication in industrial piping systems.

SKU 3G-OTH-71811

Also listed as: RSG4S · RSG 4S

Brand
RANCO
Item
Sight Glass: Brass
Category
Sweat Connection Sight Glasses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

RANCO
Manufacturer Part Number
RSG-4S
Material
Brass

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

RANCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The RANCO Sight Glass is a sweat connection sight glass made of brass, with a length of 5 3/4 inches. This RANCO product, model RSG-4S, is designed for visual flow indication in industrial piping systems.

Frequently Asked Questions

What is the RANCO RSG-4S sight glass used for?

The RANCO RSG-4S sight glass is used for visual flow indication in industrial piping systems. Its brass construction and sweat connection design make it suitable for refrigeration, HVAC, and process lines where confirming fluid presence or clarity is critical.

What are the specifications of the RANCO RSG-4S sight glass?

The RANCO RSG-4S is a sweat connection sight glass made of brass, with a length of 5 3/4 inches. The manufacturer part number is RSG-4S. It is designed for visual flow indication in industrial piping systems.

Where to buy the RANCO RSG-4S sight glass worldwide?

You can source the RANCO RSG-4S sight glass through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the product reaches your facility reliably.

How to install a RANCO sweat connection sight glass?

Install the RANCO RSG-4S by brazing or soldering the sweat connections into the pipeline. Ensure the system is depressurized and clean. Position the sight glass vertically or horizontally for clear flow observation. Follow standard piping practices for brass components.

Used in

Common applications for RANCO
Commercial refrigeration — RANCO A12-1506 constant differential defrost control for walk-in freezer defrost cycles
HVAC system protection — RANCO RHS-250150 high-limit pressure switch for overpressure safety in chillers
Industrial cooling — RANCO O12-1506 dual pressure control for monitoring suction and discharge pressures in refrigeration racks
Food storage — RANCO O10-1408 temperature control for maintaining -15°F to 40°F in cold storage rooms
Compressor protection — RANCO P30-3701 mechanical lube oil pressure control for Danfoss compressors in supermarket refrigeration
Refrigerant filtration — RANCO RBFD-163 liquid line filter drier for moisture removal in HCFC systems up to 50 tons

RANCO Products

3G Electric supplies RANCO sweat connection sight glasses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
This sweat connection refrigeration ball valve features a 1 5/8 in female sweat connection and is A2L compatible. It has no access port or relief port and operates within a temperature range of -40°F to 250°F. Used in HVAC and refrigeration systems for isolating refrigerant flow
RANCO
This sweat connection refrigeration ball valve features a 1 5/8 in female sweat connection and is A2L compatible. It has no access port or relief port and operates within a temperature range of -40°F to 250°F. Used in HVAC and refrigeration systems for isolating refrigerant flow
This sweat connection refrigeration ball valve features a 2 5/8 in female sweat connection and includes an access port. It has no relief port and is A2L compatible. The valve operates within a temperature range of -40°F to 250°F. Typical applications include flow control in HVAC and refrigeration systems
RANCO
This sweat connection refrigeration ball valve features a 2 5/8 in female sweat connection and includes an access port. It has no relief port and is A2L compatible. The valve operates within a temperature range of -40°F to 250°F. Typical applications include flow control in HVAC and refrigeration systems
RANCO Ball Valves: 400.7 Cv, 2 5/8 in Female Sweat, No Access Port, No Relief Port, -40°F to 250°F (MPN RBV-258)
RANCO
RANCO Ball Valves: 400.7 Cv, 2 5/8 in Female Sweat, No Access Port, No Relief Port, -40°F to 250°F (MPN RBV-258)
This sweat connection refrigeration ball valve from RANCO features a 1 3/8 in female sweat connection and an access port. It has no relief port and is A2L compatible. With an operating temperature range of -40°F to 250°F, it is suitable for controlling refrigerant flow in HVAC and refrigeration systems
RANCO
This sweat connection refrigeration ball valve from RANCO features a 1 3/8 in female sweat connection and an access port. It has no relief port and is A2L compatible. With an operating temperature range of -40°F to 250°F, it is suitable for controlling refrigerant flow in HVAC and refrigeration systems
RANCO RBV-218 is a sweat connection refrigeration ball valve with a 2 1/8 in female sweat connection. It has no access port and no relief port, and is A2L compatible. The valve operates within a temperature range of -40°F to 250°F. Typical applications include isolation and flow control in commercial and industrial refrigeration and HVAC systems
RANCO
RANCO RBV-218 is a sweat connection refrigeration ball valve with a 2 1/8 in female sweat connection. It has no access port and no relief port, and is A2L compatible. The valve operates within a temperature range of -40°F to 250°F. Typical applications include isolation and flow control in commercial and industrial refrigeration and HVAC systems
This refrigeration ball valve features 7/8 in female sweat connections for brazed installation. It operates within a temperature range of -40°F to 250°F and is A2L compatible for use with low-flammability refrigerants. The valve has no access port and no relief port, providing a straightforward shut-off function in HVAC and commercial refrigeration systems
RANCO
This refrigeration ball valve features 7/8 in female sweat connections for brazed installation. It operates within a temperature range of -40°F to 250°F and is A2L compatible for use with low-flammability refrigerants. The valve has no access port and no relief port, providing a straightforward shut-off function in HVAC and commercial refrigeration systems

More from RANCO

View all RANCO parts →
Brass sight glass with sweat connection for copper pipe installation. Allows visual inspection of fluid flow, color, and clarity in piping systems. Used in HVAC, refrigeration, and process lines for system diagnostics
RANCO
Brass sight glass with sweat connection for copper pipe installation. Allows visual inspection of fluid flow, color, and clarity in piping systems. Used in HVAC, refrigeration, and process lines for system diagnostics
Brass sight glass with sweat (solder) connections for installation in copper piping systems. Allows visual monitoring of fluid flow, color, and clarity in HVAC, refrigeration, and industrial process lines. Length: 2-1/2 inches
RANCO
Brass sight glass with sweat (solder) connections for installation in copper piping systems. Allows visual monitoring of fluid flow, color, and clarity in HVAC, refrigeration, and industrial process lines. Length: 2-1/2 inches
Brass sight glass with sweat connection for brazed installation. Length 4 11/16 inches. Used for visual monitoring of fluid flow, color, or clarity in industrial piping systems such as refrigeration, HVAC, and process lines
RANCO
Brass sight glass with sweat connection for brazed installation. Length 4 11/16 inches. Used for visual monitoring of fluid flow, color, or clarity in industrial piping systems such as refrigeration, HVAC, and process lines
RANCO Sight Glass: Brass, 4 in Lg (MPN RSG-2S)
RANCO
RANCO Sight Glass: Brass, 4 in Lg (MPN RSG-2S)
RANCO Sight Glass: Brass, 2 7/8 in Lg (MPN RSG-4FM)
RANCO
RANCO Sight Glass: Brass, 2 7/8 in Lg (MPN RSG-4FM)
RANCO Sight Glass: Brass, 5 3/4 in Lg (MPN RSG-5S)
RANCO
RANCO Sight Glass: Brass, 5 3/4 in Lg (MPN RSG-5S)
RANCO Sight Glass: Brass, 6 7/8 in Lg (MPN RSG-7S)
RANCO
RANCO Sight Glass: Brass, 6 7/8 in Lg (MPN RSG-7S)