B148 C95800 Fully Lugged Concentric Butterfly Valves 2″-150LB

Description

ASTM B148 C95800 Nickel Aluminum Bronze Fully Lugged Concentric Butterfly Valve

Nominal Size: 2″ (DN50) | Pressure Class: 150 LB

1. Product Overview

This product is a 2-inch, Class 150 LB fully lugged (Fully Lugged) concentric butterfly valve manufactured with valve body and disc constructed from ASTM B148 C95800 nickel aluminum bronze casting alloy. C95800 is a high-strength nickel aluminum bronze that offers exceptional seawater corrosion resistance, cavitation resistance, and erosion-corrosion resistance. It is widely used in marine engineering, seawater desalination, shipbuilding, offshore platforms, and chemical processing applications.

The fully lugged concentric butterfly valve is a resilient-seated, bubble-tight shutoff valve designed for bidirectional sealing under full pressure differential. The fully lugged body allows dead-end service (end-of-line isolation) and facilitates pipeline maintenance by enabling one-sided piping removal without valve disassembly.

C95800 nickel aluminum bronze naturally forms a robust, dense, self-healing alumina (Al₂O₃) passive film on its surface, which significantly extends valve service life in aggressive marine and corrosive environments.

2. Product Specifications

Parameter Specification
Nominal Size 2 inch (DN50)
Pressure Rating Class 150 LB / PN16
Valve Type Concentric (Centerline) / Resilient Seated
End Connection Fully Lugged (Full Lug Type)
Face-to-Face Dimension API 609 Category A short pattern (43 mm / 1.69 in)
Design Standard API 609 Category A, EN 593, MSS SP-67
Inspection & Testing API 598, ISO 5208
Top Flange ISO 5211 (Direct actuator mounting)
Flow Direction Bidirectional (full-rated bidirectional seat sealing pressure)
3. Material Specifications

3.1 C95800 Chemical Composition (ASTM B148)

Element Composition Range (%) Notes
Copper (Cu) 79.0 min Matrix
Aluminum (Al) 8.5 – 9.5 Forms protective Al₂O₃ passive film
Nickel (Ni) 4.0 – 5.0 Enhances corrosion resistance
Iron (Fe) 3.5 – 4.5 Refines grain structure
Manganese (Mn) 0.8 – 1.5 Improves castability
Silicon (Si) ≤ 0.10
Lead (Pb) ≤ 0.03
Source: ASTM B148 / UNS C95800

3.2 C95800 Mechanical Properties (Sand Cast / As Cast)

Property Typical Value ASTM Minimum
Tensile Strength, Ultimate 585 – 655 MPa (85 – 95 ksi) 85 ksi (585 MPa)
Yield Strength (0.5% EUL) 240 – 262 MPa (35 – 38 ksi) 35 ksi (240 MPa)
Elongation (in 2″ / 50.8 mm) 15 – 25% 15%
Hardness (Brinell @ 3000 kg) 159 – 190 HB 160 HB
Modulus of Elasticity 131 GPa (19,000 ksi) —
Shear Strength 400 MPa (58 ksi) —
Fatigue Strength (10⁸ cycles) 221 – 230 MPa (32 – 33.4 ksi) —
Impact Strength (Izod) 27 J (20 ft-lb) —
Source: St. Paul Foundry, AZoM, CastingQuality

3.3 C95800 Physical Properties

Property Value
Density 7.64 g/cm³ (0.276 lb/in³)
Melting Range 1043 – 1063°C (1910 – 1940°F)
Thermal Conductivity 36 W/mK (20.8 Btu·ft/ft²·hr·°F @ 68°F)
Coefficient of Thermal Expansion 16.2 μm/m·K (9.0 × 10⁻⁶ in/in/°F)
Electrical Conductivity 7.1% IACS @ 68°F
Specific Heat 0.105 Btu/lb/°F @ 68°F
Source: St. Paul Foundry

3.4 Component Material Breakdown

No. Component Material Remarks
1 Body ASTM B148 C95800 Nickel Aluminum Bronze Sand cast, fully lugged
2 Disc ASTM B148 C95800 Nickel Aluminum Bronze Concentric design, polished
3 Stem Monel K500 (standard) / 17-4PH (optional) Exceptional chloride SCC resistance
4 Seat Viton® (FKM) standard / EPDM / NBR / PTFE optional Replaceable, bubble-tight sealing
5 Seat Retainer / O-ring Viton® (FKM) / PTFE Secure seat retention
6 Bearing / Bushing PTFE / PTFE-impregnated bronze Low-friction stem support
7 Thrust Washer PTFE / Bronze Axial thrust management
8 Bolting / Fasteners SS316 / Monel Corrosion-resistant
Source: Savvy Valves

4. Design Features

4.1 Concentric (Centerline) Design

The stem centerline coincides with the disc centerline, providing the most classic and widely used butterfly valve configuration. This design offers compact structure, low flow resistance, low operating torque, and easy maintenance.

4.2 Fully Lugged Connection

Dead-end service capability: Permits installation at pipeline termination points.
Maintenance-friendly: Allows pipeline end removal without valve disassembly – one side of piping can be removed while the other side remains operational.
Bidirectional sealing: Maintains a seal against bidirectional pressure differential to prevent backflow.
4.3 Resilient Seated / Bonded Rubber Lining

Bubble-tight shutoff: Zero-leakage performance per API 609.
100% bidirectional sealing: Suitable for full-rated bidirectional seat sealing pressure.
Replaceable seat design: Seals can be replaced on-site, extending valve life and reducing maintenance cost.
4.4 Pinless Disc Design

The pinless disc design reduces wear points and ensures smooth 90° operation.
Eliminates stem pin failures common in conventional butterfly valves.
Provides reliable stem-to-disc torque transmission.
5. Seat Material Options

Seat Material Temperature Range Key Properties
Viton® (FKM) -20°C to +120°C (-4°F to +248°F) Excellent chemical resistance; ideal for seawater, fuels, and acids
EPDM -40°C to +120°C Superior for hot water and steam applications
NBR (Buna-N) -30°C to +85°C Good oil and fuel resistance
RPTFE (Reinforced PTFE) -50°C to +180°C Enhanced chemical resistance; suitable for high temperatures
HNBR -30°C to +150°C Enhanced oil and chemical resistance
6. Performance Parameters

Parameter Specification
Operating Temperature Range -25°C to +200°C (depending on seat material)
Maximum Working Pressure (2″ Class 150 LB) 20 bar (290 psi) @ 38°C
Test Pressure – Shell 1.5 × rated pressure (435 psi / 3.0 MPa)
Test Pressure – Seat 1.1 × rated pressure (319 psi / 2.2 MPa)
Leakage Class ISO 5208 Rate A / API 598 – Zero bubble leakage (bubble-tight shutoff)
Design Pressure Class Class 150 LB / PN10 / PN16
Fire-Safe Option API 607 certified (available upon request)
NACE Compliance NACE MR0175 compliant
Anti-Static Feature Available upon request
Blow-Out Proof Stem Standard design feature
7. Applicable Standards

Category Standard Description
Design & Manufacturing API 609 Category A Butterfly Valves – Concentric resilient seated type
EN 593 Industrial Valves – Butterfly Valves
MSS SP-67 Butterfly Valves – Design standard
ASME B16.34 Valves – Pressure-temperature ratings
Face-to-Face Dimensions API 609 Category A short pattern FTF length: 43 mm (2″ Class 150)
ISO 5752 Series 20 Short pattern dimensions
EN 558-1 Series 20 Face-to-face dimensions for flanged valves
End Connection ASME B16.5 Class 150 Flange drilling for lugged ends
Inspection & Testing API 598 Valve inspection and test
ISO 5208 Industrial valves – Pressure testing
EN 12266-1 Testing of valves – Requirements
Top Flange ISO 5211 Direct actuator mounting interface
Marking MSS SP-25 Standard marking system
Source: PJ Valves, Savvy Valves, Bosseal Valves

8. Dimensional Data (2″ / DN50 – Class 150 LB Fully Lugged)

Dimension Value
Face-to-Face Length (L) 43 mm (1.69 in)
End Connection Type Full lugged – ASME B16.5 Class 150 drilling pattern
Top Flange ISO 5211 F05 / F07 compatible
Disc Rotation 90°
*Note: Face-to-face dimensions per API 609 Category A / ISO 5752 Series 20 standard for 2″ Class 150 LB short pattern.*

9. Operation Options

Operator Type Features Applications
Lever Handle Manual operation, locking device available, quick shutoff (90° rotation). Standard for 2″ valves. General isolation, frequent operation
Worm Gear Self-locking, precise flow control, reduces operating torque. Throttling, larger valves, less frequent operation
Electric Actuator Remote control, fail-safe options (spring return), position feedback. Automated process control
Pneumatic Actuator Double-acting or spring return, fast response, ATEX available. Hazardous environments, remote automation
Source: Savvy Valves

10. Product Features Summary

Superior Seawater Corrosion Resistance: C95800 nickel aluminum bronze delivers exceptional saltwater corrosion resistance, cavitation resistance, and erosion resistance. Thanks to its exceptional resistance to seawater corrosion, cavitation, and biofouling, it ensures long service life in demanding marine environments.
High Strength & Wear Resistance: C95800 offers outstanding tensile strength (≥ 85 ksi) and is recognized as having the best wear resistance of all bronzes.
Fully Lugged Design: Enables dead-end service (end-of-line isolation) and allows pipeline end removal without valve disassembly, simplifying maintenance operations. Fully rated bidirectional seat sealing pressure.
Bubble-Tight Zero Leakage: The bonded resilient seat provides bubble-tight shutoff per API 609, with ISO 5208 Rate A leakage class.
Low Operating Torque: Optimized concentric disc geometry and low-friction PTFE bearings significantly reduce operating torque.
Replaceable Seat Design: Seals can be replaced on-site, extending valve life and reducing maintenance costs.
ISO 5211 Top Flange: Standardized mounting interface for direct attachment of manual, pneumatic, and electric actuators without adapters.
Fire-Safe Option Available: API 607 certified fire-safe design available upon request.
Excellent Biofouling Resistance: C95800 surface inhibits marine growth (barnacles, algae, mussels), making it ideal for long-term seawater immersion.
Anti-Static & Blow-Out Proof Stem: Available anti-static feature ensures electrical continuity; blow-out proof stem design enhances operational safety.
11. Applications

The ASTM B148 C95800 fully lugged concentric butterfly valve (2″ Class 150 LB) is widely used in industries requiring high corrosion resistance and reliable flow control in demanding environments.

Marine & Shipbuilding

Ship seawater cooling systems
Ballast water treatment systems
Fire main systems and firewater lines
Sanitary and deck wash systems
Engine room auxiliary systems
Sea chest intake and discharge lines
Offshore Oil & Gas

Offshore platforms and FPSO topside piping
Seawater injection systems
Produced water treatment
Chemical injection systems
Desalination Plants

Seawater intake pipelines
Reverse osmosis (RO) pretreatment
Brine discharge lines
Chemical & Petrochemical

Non-oxidizing acid service
Industrial process fluids
Corrosive chemical media
Power Generation

Power plant seawater cooling systems
Condenser circulating water
Auxiliary cooling systems
Water & Wastewater

Municipal water treatment
Wastewater treatment plants
Industrial water systems
12. Pressure-Temperature Rating (Class 150 LB – Reference)

Temperature Working Pressure
38°C (100°F) 20 bar (290 psi)
100°C (212°F) 18 bar (260 psi)
150°C (302°F) 16 bar (230 psi)
200°C (392°F) 14 bar (200 psi)
*Note: Ratings derived from ASME B16.34 / API 609 Category A pressure-temperature principles. Actual working pressure depends on seat material selection.*

13. Ordering Information

To ensure correct selection and quotation, please provide the following information when ordering:

Nominal Size: 2″ (DN50) ✓
Pressure Class: Class 150 LB ✓
Connection Type: Fully Lugged ✓
Body & Disc Material: ASTM B148 C95800 Nickel Aluminum Bronze
Stem Material: Monel K500 / 17-4PH / SS316
Seat Material: Viton® (FKM) / EPDM / NBR / RPTFE / PTFE
Operating Temperature: Min ______ °C / Max ______ °C
Operating Pressure: Min ______ bar / Max ______ bar
Service Medium: Seawater / Brine / Chemical / Other: ______
Operation Type: Lever / Gearbox / Electric Actuator / Pneumatic Actuator
Face-to-Face Standard: API 609 Category A / ISO 5752 Series 20 / EN 558 Series 20
Design Standard: API 609 / EN 593 / MSS SP-67
Fire-Safe Construction Required: Yes / No
NACE Compliance Required: Yes / No (NACE MR0175 available)
Special Requirements: Anti-static feature / Stem extension / Interlock / Other: ______
14. Equivalent Grades

Standard Grade / Designation
ASTM B148 C95800
UNS Number C95800
BS 1400 AB2 (CuAl10Ni)
DIN / EN CuAl10Ni / CW308G
JIS H5114 AlBC3
GB/T 1176 ZCuAl9Fe4Ni4Mn2
Military MIL-B-24480
Source: CastingQuality

15. Certifications & Compliance (Available Upon Request)

Pressure Equipment Directive: CE-PED certified (available)
ATEX: Available for explosive atmospheres
NACE: NACE MR0175 compliant
Fire-Safe: API 607 / ISO 10497 (available upon request)
SIL: SIL 3 capable (available upon request)
Material Certification: EN 10204 3.1 / 3.2 available
Disclaimer: This technical data sheet is based on general industry standards, published material data (ASTM, API, EN, ISO), and publicly available manufacturer information. All data are for reference purposes only. Exact dimensions and confirmed performance parameters shall be subject to final vendor-certified drawings and mutually agreed technical documents. Users should verify all specifications with the manufacturer prior to procurement and installation.