2″-300LB SS Bellow Seal Gate Valve

Size 2 inches (DN 50)
Pressure Class Class 300 LB (PN 50)
Body Material Stainless Steel (ASTM A182 F304 / F316 / F316L)
Manufacturing Process Forged / Cast (depending on manufacturer)
Design Standard API 602 / ASME B16.34
End Connection Standard ASME B16.5 (Flanged RF/RTJ), ASME B16.25 (BW), ASME B16.11 (SW)
Face to Face Standard ASME B16.10
Test & Inspection Std. API 598
Emission Compliance ISO 15848-1 / TA-Luft (optional)

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TECHNICAL DATA SHEET

Product Name: 2-inch 300LB Stainless Steel Bellows Seal Gate Valve
Model/Specification: 2″-300LB-SS-Bellow
نوع الصمام: Gate Valve (Bellows Sealed)
Connection Type: Flanged (RF) / Butt Weld (BW) / Socket Weld (SW) User specified

Basic Design Parameters

المعلمة	Standard/Specification
مقاس	2 inches (DN 50)
Pressure Class	Class 300 LB (PN 50)
مادة الجسم	Stainless Steel (ASTM A182 F304 / F316 / F316L)
Manufacturing Process	Forged / Cast (depending on manufacturer)
Design Standard	API 602 / ASME B16.34
End Connection Standard	ASME B16.5 (Flanged RF/RTJ), ASME B16.25 (BW), ASME B16.11 (SW)
Face to Face Standard	ASME B16.10
Test & Inspection Std.	API 598
Emission Compliance	ISO 15848-1 / TA-Luft (optional)

Technical Specifications

المعلمة	Details
Bonnet Type	Bolted Bonnet with Bellows Seal Assembly
Stem Type	Outside Screw and Yoke (OS&Y), Rising Stem
Gate Type	Flexible Wedge / Solid Wedge
Sealing Principle	Double seal: Primary Bellows Seal + Secondary Gland Packing
Bellows Material	Stainless Steel (SS304, SS316L) / Inconel 625
Applicable Media	Steam, Toxic/Hazardous Fluids, Heat Transfer Oil, Corrosive Media
نطاق درجة الحرارة	-29°C to 595°C (depending on trim)
عملية	Handwheel / Gear Operated / Electric Actuator

Material of Construction (Recommended – Stainless Steel)

Part Name	مادة	Standard/Grade
جسم	Forged Stainless Steel	ASTM A182 F316 / F316L
Bonnet	Forged Stainless Steel	ASTM A182 F316 / F316L
Gate / Wedge	Stainless Steel + Hardfacing	A182 F316 + Stellite (optional)
Seat Ring	Stainless Steel + Hardfacing	A182 F316 + Stellite / Integral
ينبع	Stainless Steel	ASTM A182 F316 (ground and polished)
Bellows	Stainless Steel	SS304, SS316L, or Inconel 625
Bonnet Gasket	Spiral Wound	Graphite + 304SS
Packing (Backup)	Flexible Graphite / PTFE	Low Sulfur, High Temp
Stem Nut	Aluminum Bronze	ZQA19-4 / C95400
Studs/Nuts	Stainless / Alloy Steel	ASTM A193 B8 / A194 8
Handwheel	Ductile Iron / Carbon Steel	ASTM A536 / A216 WCB

Main Dimensions & Connection Details

Note: Dimensions are for Flanged Ends (RF) according to ASME B16.10 and ASME B16.5. BW end length may vary.

4.1 End-to-End Dimensions (Face-to-Face)

مقاس	Class	L (RF) mm	H (Closed) mm	W (Handwheel) mm	Weight (approx. kg)
2″	300LB	216	~ 370	220	~ 38

4.2 Flange Details (Per ASME B16.5 – Class 300)

Flange Diameter (OD): 165 mm (6.5 in)
Bolt Circle Diameter: 127 mm (5.0 in)
Number of Bolt Holes: 8
Bolt Hole Size: 3/4 in (19 mm)
Hub Diameter: 92 mm (3.62 in)
Raised Face Height: 2 mm (0.06 in)

4.3 Weld End Preparation (if BW – per ASME B16.25)

Bevel Angle: 37.5° (±2.5°)
Root Face: 1.6 mm (1/16″) nominal
Counterbore: To match pipe schedule (e.g., Sch. 40, Sch. 80) as specified.

Pressure-Temperature Rating (ASME B16.34)

*Material Group: 2.1 / 2.2 (Stainless Steel – A182 F304/F316)*

Temperature (°C)	Working Pressure (MPa)	Working Pressure (psig)
-29 to 38	5.10	740
100	4.80	695
200	4.35	630
250	4.14	600
300	3.95	575
400	3.70	535
500	3.20	465

Note: Actual rating depends on specific grade (CF8, CF8M, F304, F316). Consult manufacturer for exact values above 400°C.

Test Pressure (API 598)

Test Type	Medium	Pressure (MPa)	Pressure (psig)	Note
Shell Test	Water	7.65	1,110	1.5 x 38°C Rating
High-Pressure Seat Test	Water	5.61	815	1.1 x 38°C Rating
Low-Pressure Seat Test	Air/N2	0.5 – 0.7	70 – 100	Optional
Bellows Leak Test	Helium	< 1 x 10⁻⁶ mbar·L/s	—	Optional (for fugitive emission compliance)

Features & Applications

Key Features:

Zero Leakage (Hermetic Seal): The multi-ply stainless steel bellows is welded to the stem and bonnet, creating a metal barrier that prevents fugitive emissions and ensures environmental safety.
Double Seal Safety: Incorporates a secondary graphite packing as a backup in case of bellows failure, ensuring operational integrity.
Maintenance-Free Stem: Eliminates the need for frequent packing adjustments or replacements, reducing downtime.
Long Cycle Life: Bellows design accommodates thousands of open/close cycles without fatigue (up to 10,000+ cycles).
Corrosion Resistance: Full stainless steel construction (body, bonnet, bellows) provides excellent resistance to corrosive media.
Backseat Design: Protects the bellows and packing from system pressure when the valve is fully open.
OS&Y Design: Provides visual indication of valve position.

Main Applications:

Petrochemical & Refinery Plants (handling hydrocarbons, H₂S)
Thermal Oil Systems & Heat Transfer Fluids
Steam Systems (Power Generation)
Chemical Processing (corrosive/toxic fluids)
Pharmaceutical & High-Purity Applications
Applications requiring compliance with strict fugitive emission regulations (ISO 15848, TA-Luft)

Disclaimer: The above data is prepared based on common standards for bellows seal gate valves. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement shall prevail.

ضمان:

تلتزم شركة سافي فالفز بتقديم منتجات عالية الجودة وخدمة ما بعد البيع مريحة. نضمن لصماماتنا عمر خدمة لا يقل عن ١٢ شهرًا، نوفر خلالها جميع قطع الغيار اللازمة وتعليمات الصيانة المفصلة مجانًا. خلال فترة الضمان، في حال حدوث أي ضرر غير بشري، نستبدل المكونات مجانًا ونقدم دعمًا فنيًا احترافيًا. بعد انتهاء الضمان، يدفع العميل فقط تكلفة قطع الغيار، مع الاستفادة من خدمات الصيانة المخفضة. هدفنا هو مساعدة عملائنا على خفض تكاليف التشغيل وتحسين كفاءة الإنتاج من خلال جودة موثوقة ودعم شامل لما بعد البيع. سواءً للاستفسارات الفنية أو احتياجات الصيانة، سيستجيب فريق خبرائنا على الفور لضمان الحفاظ على الأداء الأمثل لنظام صماماتك في جميع الأوقات.

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