A BS5163 NRS Metal Seated Gate Valve is a robust isolation valve manufactured according to British Standards for use in water supply, sewerage, and industrial systems. Unlike modern rubber-seated versions, this valve uses metal-to-metal contact (usually bronze or brass) for its sealing mechanism, offering superior durability in harsh environments.
1. Key Terminology
BS 5163: The British Standard that governs the design, materials, and testing of gate valves for waterworks. It ensures the valve is compatible with UK and international infrastructure.
NRS (Non-Rising Stem): The stem rotates but does not move vertically. This is critical for buried service or installations where space is limited, as the valve’s height remains constant during operation.
Metal Seated: The seal is achieved by precision-machined metal rings on the wedge and the valve body.
Technical Attributes incluld
1,Standard,BS 5163-1 & 2 (Type A) / BS EN 1171
2,Size Range,"DN50 to DN1200 (2"" to 48"")"
3,Stem Type,NRS (Non-Rising Stem) / Inside Screw
4,Pressure Rating,PN10 / PN16 / PN25
5,Sealing Type,Metal-to-Metal (Hard Seal)
6,Body Material,Ductile Iron (GGG50 / EN-GJS-500-7)
7,Bonnet Material,Ductile Iron GGG50
8,Wedge Material,Ductile Iron with Bronze/Brass face rings
9,Body Seat Rings,Gunmetal (LG2) / Bronze / Stainless Steel
10,Wedge Seat Rings,Gunmetal (LG2) / Bronze / Stainless Steel
11,Face-to-Face,BS EN 558 Series 3 (Standard BS 5163)
12,Stem Material,Stainless Steel AISI 420 / 431 / 316
13,Stem Nut,High Tensile Brass / Gunmetal
14,Stem Sealing,Triple O-ring system or Traditional Gland Packing
15,Flange Drilling,BS EN 1092-2 (Formerly BS 4504)
16,Testing Standard,BS EN 12266-1 / API 598
17,Shell Test Pressure,24 Bar (For PN16 rating)
18,Seat Test Pressure,17.6 Bar (For PN16 rating)
19,Operation,Square Cap (for T-key) or Handwheel
20,Coating,Fusion Bonded Epoxy (FBE) or Bituminous Black
21,Flow Passage,Full Bore (Unobstructed straight-through)
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
