Argco
NRS Gate Valve D.I. Body-Flanged 300PSI UL/FM
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Description
NRS Gate Valve D.I. Body-Flanged 300 PSI UL/FM - ARGCO
ARGCO NRS Flanged Gate Valves provide dependable isolation and sectional control for fire protection, water distribution, and compatible liquid piping systems.
These non-rising stem (NRS) gate valves feature a durable ductile iron body, resilient-seated design, and flanged end connections for secure installation into compatible piping systems. A fusion-bonded epoxy coating protects both the interior and exterior valve surfaces, while the non-rising stem configuration helps minimize operating clearance. Available in multiple sizes from 3" through 12", these valves are UL Listed and FM Approved and are designed in accordance with applicable FM/UL requirements and AWWA C509.
Product Highlights
- ARGCO non-rising stem gate valve
- Ductile iron body construction
- Flanged end connections
- Resilient-seated gate design
- Fusion-bonded epoxy coated interior and exterior
- 300 PSI product series
- 200 PSI rating for fire protection service per ARGCO product data
- UL Listed
- FM Approved
- Design and dimensions conform to applicable FM/UL requirements
- Designed in accordance with AWWA C509
- Operational nut configuration
- Suitable for use with post indicator valve installations where applicable
- Can be used for sectional control
- Suitable for compatible water and liquid piping systems
- Non-rising stem minimizes operating clearance requirements
- Available in multiple nominal sizes
- Designed for commercial and industrial valve applications
Available Sizes & ARGCO SKUs
| ARGCO SKU | Nominal Size | Valve Description |
|---|---|---|
| 6520270B | 3" | NRS Gate Valve D.I. Body - Flanged, UL/FM |
| 6520270 | 4" | NRS Gate Valve D.I. Body - Flanged, UL/FM |
| 6520271 | 6" | NRS Gate Valve D.I. Body - Flanged, UL/FM |
| 6520272 | 8" | NRS Gate Valve D.I. Body - Flanged, UL/FM |
| 6520273 | 10" | NRS Gate Valve D.I. Body - Flanged, UL/FM |
| 6520274 | 12" | NRS Gate Valve D.I. Body - Flanged, UL/FM |
Technical Specifications
| Brand | ARGCO |
|---|---|
| Product Type | NRS Gate Valve |
| Stem Type | Non-Rising Stem |
| Body Material | Ductile Iron |
| End Connection | Flanged x Flanged |
| Seat Type | Resilient Seated |
| Coating | Fusion-Bonded Epoxy, Interior & Exterior |
| Product Series Pressure | 300 PSI |
| Fire Protection Service Rating | 200 PSI per ARGCO Product Data |
| Operation | Operating Nut |
| Standard | AWWA C509 |
| Approvals | UL Listed / FM Approved |
| Available Sizes | 3", 4", 6", 8", 10", 12" |
| Primary Function | Isolation and Sectional Flow Control |
| Typical Applications | Fire Protection, Water Distribution, Underground Mains, PIV Assemblies, and Compatible Liquid Piping Systems |
Non-Rising Stem Design
The non-rising stem design allows the valve gate to open and close without the stem extending significantly above the valve body.
This configuration is useful where installation clearance is limited and is commonly used in fire protection, underground water distribution, and post indicator valve applications.
An operating nut provides the actuation point for opening and closing the valve and allows integration with compatible valve operating equipment.
Resilient-Seated Gate
Positive Shutoff
- Resilient-seated gate design
- Designed for dependable isolation
- Suitable for sectional control applications
- Provides full-flow passage when fully open
- Designed for repeated valve operation
Protected Ductile Iron Body
- Ductile iron valve body
- Fusion-bonded epoxy interior coating
- Fusion-bonded epoxy exterior coating
- Designed for demanding piping environments
- Corrosion protection throughout coated surfaces
Flanged Connections
Flanged ends allow the valve to be bolted between compatible piping flanges, creating a serviceable mechanical connection suitable for larger piping systems.
Flanged construction allows the valve to be removed or replaced without cutting the adjoining pipe when the piping system is properly isolated and depressurized.
Always verify nominal pipe size, flange dimensions, bolt pattern, gasket requirements, and mating flange compatibility before installation.
Typical Applications
Fire Protection Systems
- Fire sprinkler mains
- Fire protection water supply
- Post indicator valve installations
- Sectional control valves
- UL/FM applications where the selected valve is approved
Water & Utility Systems
- Water distribution piping
- Underground mains
- Commercial water systems
- Industrial piping
- Compatible liquid transmission systems
Standards & Approvals
- UL Listed – Listed for applicable fire protection service.
- FM Approved – Approved for applicable fire protection applications.
- AWWA C509 – Valve design and dimensions conform to applicable resilient-seated gate valve requirements.
- FM/UL – Design and dimensions conform to applicable FM and UL requirements.
Approval, installation, and pressure requirements should always be verified for the specific valve size and intended application.
Construction Details
The ductile iron body provides the strength required for commercial, industrial, utility, and fire protection piping installations.
The valve uses a resilient-seated gate to provide dependable shutoff while maintaining an unobstructed flow path when fully open.
Fusion-bonded epoxy coating is applied to the interior and exterior to help protect the valve body from corrosion and environmental exposure.
The non-rising stem and operating nut arrangement makes this series particularly useful for underground and post indicator valve installations.
Installation
Select the correct valve size based on the adjoining piping and system design.
Verify the mating flange dimensions, pressure class, bolt pattern, gasket type, and fastener requirements before installation.
Inspect both valve flanges and mating pipe flanges for damage, debris, or irregularities before assembly.
Install the appropriate flange gasket between the valve and each mating flange.
Align the valve carefully without forcing the adjoining pipe into position.
Install flange bolts and tighten them evenly using an appropriate cross-pattern sequence to provide uniform gasket compression.
Do not use the valve to pull misaligned piping into position.
Verify that the valve operating nut remains accessible after installation.
Operate the valve through its full travel after installation to verify proper movement before placing the piping system into service.
Follow ARGCO installation information, applicable fire protection requirements, and governing piping codes for the specific application.

Our team can help review your valve size, flange requirements, pressure requirements, fire protection application, and UL/FM needs before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What does NRS mean?
NRS means non-rising stem. The valve stem does not extend significantly upward as the valve is opened, which helps minimize operating clearance.
What material is the valve body?
The valve body is constructed from ductile iron.
What sizes are available in this listing?
This listing includes 3", 4", 6", 8", 10", and 12" nominal sizes.
What is SKU 6520270B?
ARGCO SKU 6520270B is the 3" flanged NRS ductile iron gate valve.
What is SKU 6520270?
ARGCO SKU 6520270 is the 4" flanged NRS ductile iron gate valve.
What is SKU 6520271?
ARGCO SKU 6520271 is the 6" flanged NRS ductile iron gate valve.
What is SKU 6520272?
ARGCO SKU 6520272 is the 8" flanged NRS ductile iron gate valve.
What is SKU 6520273?
ARGCO SKU 6520273 is the 10" flanged NRS ductile iron gate valve.
What is SKU 6520274?
ARGCO SKU 6520274 is the 12" flanged NRS ductile iron gate valve.
Are these valves UL Listed and FM Approved?
Yes. ARGCO identifies this flanged NRS gate valve series as UL Listed and FM Approved.
Does the valve meet AWWA C509?
ARGCO states that the design and dimensions conform to AWWA C509 along with applicable FM and UL requirements.
Is the valve resilient seated?
Yes. ARGCO identifies these valves as resilient seated.
What coating is used on the valve?
The valve has a fusion-bonded epoxy coating on the interior and exterior.
Is this a 300 PSI valve?
ARGCO markets this series as a 300 PSI NRS flanged gate valve. ARGCO separately states a 200 PSI rating for fire protection service, so the applicable pressure requirement should be verified for the specific system.
Can this valve be used with a PIV?
Yes. ARGCO identifies the operating nut configuration for use with post indicator valve applications.
What should I verify before ordering?
Confirm the nominal valve size, mating flange dimensions, system pressure, intended service, UL/FM requirements, installation configuration, and exact ARGCO SKU.
Important Ordering & Installation Notes
- This listing includes ARGCO flanged NRS ductile iron gate valves in multiple sizes.
- Available sizes are 3", 4", 6", 8", 10", and 12".
- SKU 6520270B is the 3" valve.
- SKU 6520270 is the 4" valve.
- SKU 6520271 is the 6" valve.
- SKU 6520272 is the 8" valve.
- SKU 6520273 is the 10" valve.
- SKU 6520274 is the 12" valve.
- Verify the exact selected SKU and nominal size before ordering.
- Valve body material is ductile iron.
- Connection type is flanged x flanged.
- Valve design is non-rising stem.
- Valve is resilient seated.
- Interior and exterior surfaces are fusion-bonded epoxy coated.
- This product family is identified by ARGCO as 300 PSI.
- ARGCO identifies a 200 PSI rating for fire protection service.
- Do not assume the general 300 PSI product designation overrides the stated fire protection service rating.
- Verify the allowable working pressure for the intended application before installation.
- Valves are UL Listed and FM Approved.
- Design and dimensions conform to applicable FM/UL requirements and AWWA C509.
- Confirm approval requirements for the specific fire protection system.
- Verify flange size and compatibility before ordering.
- Verify bolt pattern, gasket requirements, and flange fasteners separately.
- Flange gaskets and mounting hardware should not be assumed included unless specifically stated for the selected SKU.
- Align mating flanges before tightening fasteners.
- Do not use the valve to correct pipe misalignment.
- Tighten flange bolts evenly using an appropriate cross-pattern sequence.
- Ensure the operating nut remains accessible after installation.
- Operate the valve through its full travel before placing the system into service.
- Suitable applications may include fire protection, water distribution, PIV assemblies, sectional control, and compatible liquid piping systems.
- Follow ARGCO installation information and all applicable fire protection and piping requirements.