NRS Metal-Seated Gate Valve

Nominal Diameter (DN) mm DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600
Nominal Pressure (PN) Bar PN10 / PN16 / PN25
Working Pressure – Max allowable pressure decreases as temperature increases (Refer to Pressure-Temperature rating chart)

تماس با ما

توضیحات

British Standard Metal-Seated Flanged Gate Valve Technical Data Sheet

Product Name: British Standard Non-Rising Stem Flanged Gate Valve
Series/Model: Z45W / BS 5163 Type (Metal Seated)
Connection: Flanged Ends
نوع: Non-Rising Stem (NRS) / Inside Screw
Seat Material: Bronze (Seat surface faced with Bronze alloy)
جنس بدنه: Cast Iron / Grey Iron

Application & Media

This valve is designed for isolating or connecting media in pipelines. It is suitable for water, sewage, seawater, oil, and non-corrosive gases. Due to the bronze-to-bronze metal seat, it offers better temperature and wear resistance compared to soft-seal valves, making it ideal for applications requiring metallic sealing surfaces.

Design & Compliance Standards

Item	Standard / Code	توضیحات
Design & Manufacture	BS 5163 / EN 1074	Specification for gate valves used in water supply systems
Flange Dimensions	BS EN 1092-2	Flanges for cast iron pipes and fittings
Face-to-Face Length	EN 558-1 / BS 5163	Installation dimensions for flanged valves
Pressure Testing	EN 12266-1 / ISO 5208	Valve leakage and pressure test standards
Top Flange	ISO 5210	Standard for actuator mounting (optional)

Main Technical Parameters

پارامتر	Unit	Value
قطر اسمی (DN)	mm	DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600
Nominal Pressure (PN)	Bar	PN10 / PN16 / PN25
Working Pressure	–	Max allowable pressure decreases as temperature increases (Refer to Pressure-Temperature rating chart)
Shell Hydrostatic Test	Bar	1.5 x PN (e.g., For PN16: 24 Bar)
Seal Test Pressure	Bar	1.1 x PN (e.g., For PN16: 17.6 Bar)
Working Temperature	℃	-10°C to +120°C (Subject to pressure rating and material limits)
Operation Type	–	Handwheel (Standard), Bevel Gear, Electric Actuator, Pneumatic Actuator

Main Component Materials

Part Name	مواد	Notes / Standard
بدن	Cast Iron	Grade: HT250 / EN-GJL-250 (Equivalent to BS 1452)
Bonnet	Cast Iron	Grade: HT250 / EN-GJL-250
Wedge (Gate)	Cast Iron + Bronze Faced	Bronze alloy (e.g., Aluminum Bronze / Tin Bronze) deposited or welded on the seat area
Seat Ring	Bronze / Brass	Integral seat ring deposited on the body or welded bronze ring
ساقه	Stainless Steel	Grade: 2Cr13 / AISI 304 / AISI 316 (Prevents rust and seizing)
Stem Nut	High-strength Brass	Located inside the wedge for Non-Rising Stem operation
Packing	Graphite / PTFE	Provides reliable stem sealing to prevent external leakage
Handwheel	Ductile Iron / Steel	Epoxy coated

Main Dimensions & Connection Data (PN16)

Note: Dimensions are for reference only. Please verify with the manufacturer’s final drawing before installation.

DN (mm)	Length L (mm)	Flange Dia. D (mm)	Bolt Circle D1 (mm)	No. of Bolts n	Bolt Hole Dia. d (mm)	Total Height H (approx.) (mm)	Handwheel Dia. Do (approx.) (mm)
50	150	165	125	4	19	___	___
65	170	185	145	4	19	___	___
80	180	200	160	8	19	___	___
100	190	220	180	8	19	___	___
125	200	250	210	8	19	___	___
150	210	285	240	8	23	475	280
200	230	340	295	12	23	540	360
250	250	395	350	12	23	630	360
300	270	445	400	12	23	780	400
350	290	505	460	16	23	885	400
400	310	565	515	16	26	990	400

Product Features

Metal-to-Metal Seating: The wedge and seat are faced with a Bronze alloy, ground and lapped to ensure a reliable, wear-resistant seal suitable for higher temperatures and fluids with some impurities.
Non-Rising Stem (NRS): The stem is threaded inside the valve and does not rise when the valve is operated. This design is ideal for spaces with limited vertical clearance or underground installation, as the handwheel height remains constant.
Full Bore Design: The straight-through flow path minimizes fluid resistance and prevents sediment accumulation.
Blow-Out Proof Stem: The stem features a T-head or shoulder at the bottom, preventing it from being ejected by internal pressure, allowing for safe packing replacement under pressure.
Anti-Corrosion Coating: Internal and external surfaces are typically coated with non-toxic epoxy powder to prevent corrosion, making it suitable for potable water systems.

Ordering Information

To ensure the correct valve is supplied, please provide the following specifications when ordering:

Product Name and Model.
Nominal Diameter (DN).
Nominal Pressure (PN).
Body Material (Cast Iron) and Seat Material (Bronze).
Media Type and Working Temperature.
Quantity and any special requirements (e.g., special length, special coating, gearbox).

ضمانت:

شرکت SAVVY VALVES متعهد به ارائه کیفیت استثنایی محصول و خدمات پس از فروش بدون نگرانی است. شیرهای ما حداقل ۱۲ ماه عمر مفید دارند که در این مدت، تمام قطعات یدکی لازم و دستورالعمل‌های دقیق تعمیر و نگهداری را به صورت رایگان ارائه خواهیم داد. در طول دوره گارانتی، در صورت بروز هرگونه آسیب غیر انسانی، قطعات را بدون هیچ هزینه‌ای تعویض کرده و پشتیبانی فنی حرفه‌ای ارائه می‌دهیم. پس از انقضای گارانتی، مشتریان فقط باید هزینه قطعات یدکی را بپردازند، در حالی که همچنان از خدمات تعمیر و نگهداری با تخفیف بهره‌مند می‌شوند. هدف ما کمک به مشتریان برای کاهش هزینه‌های عملیاتی و افزایش بهره‌وری تولید از طریق کیفیت قابل اعتماد و پشتیبانی جامع پس از فروش است. چه برای سوالات فنی و چه برای نیازهای تعمیر و نگهداری، تیم متخصص ما به سرعت پاسخ خواهد داد تا اطمینان حاصل شود که سیستم شیر شما در هر زمان عملکرد بهینه خود را حفظ می‌کند.

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