DN50-PN16 Welded Flanged Close Die Forged Gate Valve

Design Standard BS 5352 / API 602 / ASME B16.34
Nominal Size DN50 (2 inch)
Pressure Class PN16 (Equivalent to Class 150 LB)
Structure Type OS&Y (Outside Screw and Yoke), Bolted Bonnet
Connection Type Welded Flange
Operation Handwheel
Body Material ASTM A105N (Forged Carbon Steel, suitable for NACE MR0175)

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설명

British Standard Forged Steel Gate Valve Technical Data Sheet (BS Series)

A105N Material DN50 PN16 Welded Flange

General Information

Item	사양
밸브 유형	Forged Steel Gate Valve
Design Standard	BS 5352 / API 602 / ASME B16.34
공칭 크기	DN50 (2 inch)
Pressure Class	PN16 (Equivalent to Class 150 LB)
Structure Type	OS&Y (Outside Screw and Yoke), Bolted Bonnet
Connection Type	Welded Flange
작업	Handwheel
본체 재질	ASTM A105N (Forged Carbon Steel, suitable for NACE MR0175)

Applicable Standards

Item	Standard Code
Design & Manufacturing	BS 5352, API 602, ASME B16.34
Face-to-Face / End-to-End	BS EN 558-1 (Series 1) / Manufacturer Standard
Flanged Connections	ASME B16.5 (Class 150)
Test & Inspection	API 598
Pressure-Temperature Rating	ASME B16.34
Valve Marking	MSS SP-25

Main Design Features

차체 구조: One-piece die forged body, dense structure, high strength, eliminates casting defects
Bonnet Connection: Bolted bonnet design with 304/Flexible Graphite spiral wound gasket sealing
Wedge Design: Solid wedge, fully guided design, minimizes wear, reliable sealing
Stem Design: Backseat feature allows packing replacement under pressure when valve is fully open
Seating Surface: Seat rings hardfaced with Stellite for durability
Packing: Flexible graphite packing, low emission design
Seat Rings: Renewable seat rings, made from hardened stainless steel

Main Component Materials (A105N Material)

Item	Part Name	재료	Standard/Remark
1	몸	ASTM A105N	Forged Carbon Steel, Normalized
2	Bonnet	ASTM A105N	Forged Carbon Steel
3	Wedge	ASTM A276 410 / A105N+STL	13Cr Stainless Steel or Hardfaced
4	Seat Ring	ASTM A276 410 / STL Hardfaced	Hardened Stainless Steel, Renewable
5	줄기	ASTM A182 F6a (13Cr)	Stainless Steel
6	Gasket	304 + Flexible Graphite	Spiral Wound
7	Packing	Flexible Graphite	Low emission design
8	Gland Bushing	ASTM A276 410	Stainless Steel
9	Gland Flange	ASTM A105	Carbon Steel
10	Bonnet Bolt	ASTM A193 Gr.B7	Alloy Steel
11	Bonnet Nut	ASTM A194 Gr.2H	Heavy Hex Nut
12	Handwheel	ASTM A197	Malleable Cast Iron

Technical Parameters & Dimensions

5.1 Pressure-Temperature Ratings

Item	매개변수
Nominal Pressure	PN16 (1.6 MPa)
Shell Test Pressure	2.4 MPa (Hydrostatic) [API 598]
High-Pressure Seat Test Pressure	1.76 MPa (Hydrostatic) [API 598]
Low-Pressure Pneumatic Test Pressure	0.5 – 0.7 MPa (Air) [API 598]
온도 범위	-29°C ~ 425°C
Applicable Media	Water, steam, oil, etc.

5.2 Dimensions (DN50 PN16 Welded Flange)

Dimension	Value	Remark
End-to-End Length (L)	178 mm	For PN16/Class 150, per BS EN 558-1 Series 1
Height (H-OPEN)	Approx. 284 mm	Fully open position
Handwheel Diameter (W)	180 mm
Flange Diameter (D)	152.4 mm	ASME B16.5 Class 150 2″ RF
Flange Thickness (T)	19.1 mm	ASME B16.5 Class 150 2″ RF
Bolt Circle Diameter	120.7 mm	ASME B16.5 Class 150 2″ RF
Number of Bolt Holes/Size	8 / 19 mm	ASME B16.5 Class 150 2″ RF
Flange Sealing Face	Raised Face	ASME B16.5
Bore Diameter (d1)	33 mm	Reduced bore, typical API 602 design
Weight	Approx. 14-18 kg	Reference value, may vary by manufacturer

5.3 End Connection Details

Welded Flange: Flange dimensions per ASME B16.5 Class 150, Raised Face sealing, flange to be welded to pipe
Flange Type: Integral forged flange or welded flange

Test & Inspection (API 598)

Test Item	Test Pressure	Medium	Acceptance Criteria
Shell Test	2.4 MPa	Water	No visible leakage
High-Pressure Seat Test	1.76 MPa	Water	No visible leakage
Low-Pressure Seat Test	0.5 – 0.7 MPa	Air	No bubbles leakage
Test Duration	Per API 598	—	Hold time conforms to standard

Marking & Supply

Valve Marking: Per MSS SP-25, nameplate to include nominal size, pressure class, material, heat number, design standard, etc.
Flow Direction: Gate valve has no flow direction restriction
Cleaning & Protection: Valves internally and externally cleaned, flange faces covered with protectors and coated with rust preventive
Documentation: Material certificates, pressure test reports, declaration of conformity provided with shipment

보증:

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