Non Rising Stem Resilient Seated Gate Valve Manufacturer – KELOR
KELOR Non Rising Stem (NRS) Resilient Seated Gate Valve is engineered for dependable isolation service across municipal, industrial, and utility pipeline networks. Unlike rising stem designs, the non-rising stem mechanism keeps the stem position fixed, making it especially suitable for buried pipelines, valve chambers, and installations with limited vertical clearance.
The valve features a fully encapsulated resilient rubber wedge that ensures tight shut-off in both directions, even under low-pressure conditions. The smooth epoxy-coated body and wedge minimize head loss and protect against corrosion, making the valve ideal for potable water, raw water, irrigation, firefighting, and wastewater applications.
Manufactured in compliance with international standards such as EN 1171, EN 1074, and BS 5163, KELOR NRS Gate Valves are available with flanged ends suitable for ANSI, DIN, and BS flange drilling. Each valve undergoes stringent pressure and leakage testing to guarantee long-term, maintenance-free performance.
KELOR offers these valves in a wide size range with durable ductile iron construction, stainless steel stem, and replaceable elastomer seats. The non-rising stem design also allows easy operation using handwheel or gearbox without exposing the stem threads to external contaminants.
Key Applications
Municipal water distribution pipelines
Underground and chamber installations
Firefighting and hydrant networks
Irrigation and water treatment plants
Industrial utility and process lines
Why Choose KELOR?
Direct manufacturer and exporter from India
High-quality ductile iron construction
Resilient seated wedge for zero leakage
Corrosion-resistant epoxy coating
Bulk supply for infrastructure and EPC projects
Frequently Asked Questions (FAQ)
What is a Non Rising Stem gate valve? It is a gate valve where the stem does not move vertically, making it suitable for underground or limited-space installations.
What are the advantages of resilient seated gate valves? They provide bubble-tight shut-off, corrosion resistance, and longer service life compared to metal-seated valves.
Is this valve suitable for underground installation? Yes, the NRS design is ideal for buried pipelines and valve chambers.
What media can this valve handle? Water, potable water, wastewater, irrigation fluids, and neutral liquids.
What pressure ratings are available? Typically PN10 and PN16, depending on size and application.
Does the valve support bi-directional flow? Yes, the resilient wedge allows tight sealing in both flow directions.
What standards does KELOR follow? EN 1171, EN 1074, BS 5163, ISO 5208, and equivalent international standards.
Is epoxy coating provided? Yes, fusion bonded epoxy coating is applied for corrosion protection.
Can this valve be used for potable water? Yes, food-grade epoxy and EPDM seats are available for potable water service.
Do you supply in bulk for projects? Yes, KELOR specializes in bulk supply for municipal, industrial, and export projects.
Technical Specification
Specification
Details
Valve Type
Non Rising Stem Resilient Seated Gate Valve
Size Range
DN 50 to DN 600
Pressure Rating
PN10 / PN16
End Connection
Flanged – ANSI / DIN / BS
Design Standards
EN 1171, EN 1074, BS 5163
Testing Standard
ISO 5208 / EN 12266-1
Operation
Handwheel / Gearbox
Temperature Range
Up to 80°C (depending on seat material)
Material of Construction
Component
Material
Body & Bonnet
Ductile Iron (EN-GJS-500-7)
Wedge
Ductile Iron fully vulcanized with EPDM / NBR
Stem
Stainless Steel (SS 410 / SS 420)
Seat
Resilient Rubber (EPDM / NBR)
O-Rings
NBR / EPDM
Coating
Fusion Bonded Epoxy (FBE)
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