TECHNICAL DATA SHEET
Product Name: 3/4-inch 2500LB Welded Bonnet Globe Valve
Model/Specification: 3/4″-2500LB-WELDED-GLOBE
نوع الصمام: Welded Bonnet Globe Valve (Forged)
Connection Type: Socket Weld (SW) / Butt Weld (BW) / Threaded (NPT) User specified
- Basic Design Parameters
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المعلمة
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Standard/Specification
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مقاس
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3/4 inch (DN20)
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Pressure Class
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Class 2500 LB (PN420 / 6000 PSI)
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مادة الجسم
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Forged Carbon Steel (A105) / Forged Stainless Steel (A182 F304/F316) / Alloy Steel (F22) User specified
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Manufacturing Process
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Close Die Forged Steel
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Design Standard
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API 602 / ASME B16.34 / BS 5352
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Bonnet Type
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Welded Bonnet (Threaded-in and strength-welded)
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End Connection Standard
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ASME B16.11 (SW) / ASME B16.25 (BW) / ASME B1.20.1 (NPT)
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Face to Face Standard
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ASME B16.10
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Test & Inspection Std.
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API 598
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- Technical Specifications
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المعلمة
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Details
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نوع الصمام
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Straight Pattern Globe Valve, Forged Construction
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Bonnet Type
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Welded Bonnet – Threaded-in and seal welded for zero leakage
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Stem Type
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Outside Screw and Yoke (OS&Y), Rising Stem
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Disc Type
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Parabolic / Needle-type Disc (for throttling)
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Seat Type
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Integral Seat (hardfaced optional)
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Applicable Media
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Steam, Water, Oil, Gas, Corrosive Fluids (depending on material)
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نطاق درجة الحرارة
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-29°C to +550°C (depending on material)
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Flow Direction
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Flow under disc (standard)
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عملية
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Handwheel (standard) / Gear / Actuator
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Backseat Design
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Standard (protects packing when fully open)
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- Material of Construction (Recommended – Carbon Steel A105)
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Part Name
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مادة
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Standard/Grade
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جسم
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Forged Carbon Steel
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ASTM A105
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Bonnet
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Forged Carbon Steel
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ASTM A105
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Disc / Valve Plug
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Stainless Steel + Hardfacing
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13Cr / F304 + Stellite (optional)
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Seat Ring
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Integral Seat (Hardfaced optional)
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13Cr / F304
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ينبع
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Stainless Steel
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ASTM A182 F6a (13Cr) / F304
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Gasket
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None (Welded Bonnet – no gasket)
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—
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Packing
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Flexible Graphite / PTFE
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Low sulfur graphite
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Stem Nut
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Aluminum Bronze
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C95400 / CuAl10Fe3
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Body Bolts/Nuts
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None (Welded Bonnet)
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—
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Handwheel
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Malleable Iron / Carbon Steel
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ASTM A197
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*For Stainless Steel version (A182 F304/F316): body/bonnet to SS, disc/stem to SS.*
- Main Dimensions & Connection Details
*Note: Dimensions for 3/4″ Class 2500 Welded Bonnet Globe Valve with Socket Weld Ends. Based on API 602 and industry standards .*
4.1 End-to-End Dimensions (Face-to-Face – Socket Weld)
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مقاس
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Pressure Class
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L (mm)
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L (in)
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H (Open) mm
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H (Open) in
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W (Handwheel) mm
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Weight (kg)
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Weight (lbs)
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3/4″
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2500LB
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92
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3.62
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~171
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~6.73
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100
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~1.9
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~4.2
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Note: Welded bonnet version is slightly lighter than bolted bonnet (approx 0.2 kg less) .
4.2 End Preparation Details (Per ASME Standards)
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Connection Type
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معيار
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Details
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Socket Weld (SW)
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ASME B16.11
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3/4″ Socket Weld, bore to match pipe schedule (Sch. 160 / XXS)
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لحام بعقب (BW)
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ASME B16.25
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Bevel: 37.5°, Root face: 1.6 mm
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Threaded (NPT)
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ASME B1.20.1
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3/4″ NPT Female
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4.3 Welded Bonnet Design Details
- Bonnet Attachment: Threaded-in to precise torque, then seal welded
- Weld Type: Full penetration strength weld
- Leakage Protection: Dual protection – threads + strength weld
- الحشية: None (eliminates gasket leak path)
- Pressure-Temperature Rating (ASME B16.34 / Class 2500)
Material Group: Carbon Steel (ASTM A105)
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Temperature (°C)
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Working Pressure (bar)
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Working Pressure (psi)
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ملحوظات
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-29 to 38
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420
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6090
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Maximum Rating (Class 2500)
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100
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395
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5730
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200
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360
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5220
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300
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320
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4640
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400
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285
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4135
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425
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245
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3550
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Max for A105
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*For Stainless Steel (F304/F316): similar ratings up to 550°C with derating .*
- Test Pressure (API 598)
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Test Type
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Medium
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Pressure (bar)
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Pressure (psi)
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Acceptance Criteria
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Shell Test (Hydrostatic)
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Water
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630
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9135
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1.5 x 38°C Rating (no visible leakage)
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High-Pressure Seat Test
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Water
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462
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6700
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1.1 x 38°C Rating (Rate A/B per API 598)
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Low-Pressure Seat Test
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Air / N2
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5.5 – 7.0
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80 – 100
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Bubble-tight
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Welded Joint Test
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Water/Helium
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Full shell pressure
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—
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100% inspected, no leakage
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- Flow Characteristics (3/4″ – Class 2500)
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المعلمة
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Value
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Flow Coefficient Cv (approx)
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~2.5 – 4.0 (typical for 3/4″ globe valve)
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Flow Coefficient Kv (approx)
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~2.2 – 3.5
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Flow Characteristic
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Linear / Equal Percentage (depending on trim)
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Seat Leakage Class
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Class IV (Metal Seat) per ANSI/FCI 70-2
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نوع التجويف
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Full Bore / Reduced Bore (optional)
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- Welded Bonnet Advantages
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Feature
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Benefit
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No Gasket
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Eliminates potential leak path at body-bonnet joint
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Threaded + Welded
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Dual protection against leakage
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Compact Design
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Lighter than bolted bonnet (approx 0.2 kg less)
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High Integrity
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Suitable for high pressure, high temperature, and hazardous services
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Maintenance
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Non-repairable bonnet – but highly reliable
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Zero Fugitive Emissions
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Ideal for critical service applications
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- Features & Applications
- Key Features:
- Welded Bonnet Construction: Threaded-in and strength-welded bonnet eliminates gasket and provides zero leakage at body-bonnet joint .
- High Pressure Capability (2500LB): Designed for extreme high-pressure applications up to 420 bar (6000 PSI) .
- Forged Body Construction: Close die forged steel provides superior strength, uniform grain flow, and absence of porosity .
- Integral Seat: Machined directly into body for maximum strength and reliability .
- API 602 Design: Meets stringent industry standards for forged steel valves .
- Excellent Throttling Control: Globe valve design provides precise flow regulation .
- Backseat Design: Protects stem packing when valve is fully open .
- OS&Y Design: Rising stem provides visual indication of valve position .
- High Temperature Capability: Suitable for temperatures up to 550°C with appropriate materials .
- Compact & Lightweight: Welded bonnet design reduces weight compared to bolted bonnet .
- Multiple End Options: Available in socket weld, butt weld, or threaded connections .
- Fugitive Emission Control: Welded bonnet eliminates potential leak path, ideal for critical service .
- Main Applications:
- High-Pressure Steam Systems: Power plants, boiler systems .
- Refineries & Petrochemical: Hydrocarbon processing, high-pressure fluid control .
- Oil & Gas Production: Wellhead control, high-pressure gathering systems .
- Chemical Processing: Corrosive fluid handling (with SS materials) .
- High-Temperature Applications: Up to 550°C with alloy materials .
- الخدمة الحرجة: Where zero leakage and maximum reliability are required .
- Instrument Connections: Small bore high-pressure isolation .
- Comparison: Welded Bonnet vs. Bolted Bonnet (3/4″ Class 2500)
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المعلمة
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Welded Bonnet
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Bolted Bonnet
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Weight
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1.9 kg
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2.1 kg
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Leak Path
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None (welded)
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Gasket (potential leak)
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Maintenance
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Non-repairable bonnet
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Repairable/removable
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Fugitive Emissions
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Zero
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Potential (gasket/packing)
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Cost
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Slightly lower
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Slightly higher
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طلب
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Critical service, high pressure
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General service
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- Ordering Information
Please specify when ordering:
- Valve size: 3/4″ (DN20)
- Pressure class: 2500LB
- Body material: A105 / F304 / F316 / F22
- Bonnet type: Welded Bonnet
- End connections: SW / BW / NPT
- Seat type: Metal (standard)
- Disc/seat hardfacing: Stellite (optional)
- Operation: Handwheel / Gear / Actuator
- Special requirements: NACE, oxygen cleaning, low temperature, etc.
*Disclaimer: The above data is prepared based on common industry standards (API 602, ASME B16.34, API 598) for welded bonnet globe valves . The welded bonnet design provides maximum integrity for high-pressure and critical service applications by eliminating the body-bonnet gasket. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement and certified drawings 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.