Threaded Connections: The Backbone of Standard Installations
When you are working on smaller diameter lines or applications where disassembly matters, threaded connections remain the workhorse choice. Carilovalves produces NPT (National Pipe Thread) and BSP (British Standard Pipe) threaded ball valves in sizes ranging from 1/4 inch up to 2 inches. Their threaded offerings include a pressure rating spectrum spanning 1000 WOG to 2000 WOG, meaning these valves handle operating pressures between 200 PSI and 300 PSI depending on the specific model and size. The company machines thread specifications with tolerances held within ±0.05mm, ensuring leak-free connections when properly torqued. Each threaded valve undergoes helium leak testing at 1×10⁻⁸ mbar·l/s sensitivity before leaving the facility. The internal threading uses a 30-degree truncated flank profile for NPT and a 55-degree Whitworth form for BSP variants, both manufactured to ASME B1.20.1 and ISO 228 standards respectively.
Flanged Connections: Built for Heavy-Duty Pipeline Systems
Flanged connections dominate the mid to large diameter valve market, and Carilovalves has invested heavily in this segment. Their flanged ball valve catalog covers RF (Raised Face), FF (Flat Face), and RTJ (Ring Type Joint) flange faces across multiple pressure classes. You will find Class 150, Class 300, and Class 600 flanged valves in their inventory, with sizes running from 2 inches all the way up to 48 inches for certain models. The bolt circle dimensions follow ASME B16.5 for sizes up to 24 inches and ASME B16.47 for larger dimensions. Carilovalves applies 100% radiography testing on weld neck flanges for Class 300 and above applications, and every flange face receives surface finish treatment to Ra 3.2μm minimum. Their 24-inch Class 150 flanged ball valve, for instance, features a 29.5-inch bolt circle with 8 holes measuring 1.125 inches in diameter, weighing approximately 380 kilograms depending on trim configuration. For projects requiring fugitive emission compliance, they offer Graphite laminated gaskets pre-assembled with studs and nuts rated for 500 PPM or lower leakage.
Butt Weld Ends: Where Permanent Integrity Counts
Butt weld end connections eliminate potential leak paths that threaded or flanged joints might introduce over time. Carilovalves manufactures butt weld ball valves with schedule 40, Schedule 80, and Schedule 160 wall thickness options for carbon steel bodies, while stainless steel variants come in Schedule 10S and Schedule 40S. The weld end preparation follows ASME B16.25, with HAZ (Heat Affected Zone) control maintained within 2mm of the weld interface. Their butt weld valves undergo PWHT (Post Weld Heat Treatment) when wall thickness exceeds 0.5 inches, with temperature soak times calculated using the formula: (Wall thickness in inches × 25 minutes) + 30 minutes, targeting 600-650°C for carbon steel grades. You can specify BW (Butt Weld) ends in sizes from 1 inch to 36 inches, with custom bores available for specific flow coefficient requirements. The company maintains 16-point dimensional inspection on every butt weld valve, measuring inside diameter at four locations and recording ovality percentage which must stay below 1% for acceptance.
Socket Weld Connections: Compact Solutions for Critical Service
Socket weld end connections appeal to applications needing a compact profile while maintaining high-pressure capability. Carilovalves produces socket weld ball valves in sizes from 1/4 inch to 2 inches with pressure ratings reaching 1000 PSI WOG. The socket depth follows ASME B16.11 dimensions, typically 0.375 inches for 1/4-inch valves scaling up to 0.875 inches for 2-inch valves. Their quality protocol requires socket diameter verification to within 0.004 inches of nominal, and the fillet weld leg dimensions must measure between 0.12 and 0.16 inches for optimal fatigue resistance. Socket weld valves from Carilovalves see heavy deployment in chemical processing, where their 316SS construction handles corrosive media including sulfuric acid solutions up to 10% concentration at ambient temperatures. The bore alignment tolerance sits at 0.03mm maximum, ensuring smooth ball rotation even after multiple thermal cycles.
Wafer Style Connections: Space-Saving Design for Between-Flange Mounting
The wafer style design lets you install valves directly between pipeline flanges, eliminating long bolt patterns and reducing overall system weight. Carilovalves offers wafer ball valves in sizes 2 inches through 24 inches, rated for Class 150 and Class 300 pressure classes. Their wafer valves use a body design with tapped body tapped bosses for optional positioning stops, and the face-to-face dimensions comply with API 608 for reduced face-to-face versions following ISO 5752 Series 20 short pattern. The centering lugs feature spring-loaded design on sizes above 12 inches for easier installation, and the valve body incorporates carbon filled PTFE thrust washer with a coefficient of friction below 0.15. A typical 6-inch Class 150 wafer ball valve from Carilovalves measures 168.3mm face-to-face and weighs approximately 45 kilograms with full SS316 trim. The flange sealing surfaces require Ra 6.3μm maximum, and the valve body includes locating holes sized at +0.5mm/-0mm for perfect centering during installation.
Lug Style Connections: Independent Disassembly Flexibility
Lug style connections provide a distinct advantage when you need to remove downstream pipeline sections without disturbing the upstream side. Carilovalves manufactures lug style ball valves with full lug bodies featuring threaded or tapped lugs depending on your installation preference. Their lug valve range spans 2 inches to 24 inches, available in both double-ended and single-ended configurations. The lug dimensions follow MSS-SP-61 for pressure testing requirements, and each lug receives elongation testing with minimum 20% elongation at break guaranteed. The 316SS lug body construction provides excellent corrosion resistance, achieving ASTM A276 specifications with yield strength exceeding 205 MPa at room temperature. You will appreciate the anti-blowout stem design featuring a tapered plug and Belleville washer spring stack that maintains stem torque regardless of pressure cycling. Lug bolt holes include +1.6mm tolerance for easy alignment, and the flange contact face comes finished to Ra 3.2μm.
Grooved Connections: Fast-Track Installation Speed
Grooved end connections revolutionized installation speed in commercial HVAC and fire protection applications. Carilovalves now produces grooved ball valves compatible with standard AWWA C606 grooved couplings, available in 2-inch through 12-inch sizes. The grooves follow ANSI/AWWA C606 specifications with groove diameter tolerances of +0.2mm/-0mm and groove width maintained at 8.7mm ± 0.4mm. Their grooved valves feature ductile iron bodies with fusion bonded epoxy coating achieving 300 micron DFT (Dry Film Thickness) for corrosion protection in buried or submerged service. The pressure ratings accommodate 232 PSI for 2-6 inch sizes and 175 PSI for 8-12 inch sizes, with temperature ratings spanning -10°C to 93°C. Groove-to-groove dimensions comply with manufacturer-specific quick-connect coupling requirements, and the assembly can be completed with simple hand tools in under five minutes per joint.
Compression Connections: Reusable and Maintenance-Friendly
Compression connections serve instrument air, sampling systems, and analytical lines where repeated connection and disconnection matters. Carilovalves supplies compression fit ball valves accepting ASTM F1970 compliant ferrule sets, available for tubing sizes from 1/4 inch OD to 1 inch OD. The grip ring design uses two-piece construction with stainless steel grab ring and PTFE split ring for sealing, achieving bubble-tight performance at 5000 PSI with helium leak testing performed at 1×10⁻⁹ mbar·l/s. The body material choices include 316SS, Alloy 625, and Hastelloy C276 for sour gas service meeting NACE MR0175 requirements. Their compression valves include a 37-degree flare fitting variant compatible with ASTM B780 tubing, with pull-out resistance exceeding 1500 PSI pull force for 1/2-inch tubing configuration. The assembly torque values come documented in installation instructions, typically ranging 25-35 ft·lbs for 1/4-inch to 1/2-inch sizes.
Special Connection Configurations: Meeting Unique Application Requirements
Beyond standard connection types, Carilovalves accommodates project-specific connection requirements through their engineering team. They produce valves with male-female end combinations, allowing you to mix connection types on a single valve body—for example, NPT threaded on one end with butt weld on the opposite. Custom flange facings including tongue-and-groove, saddle ring, and hub configurations receive RF (Raised Face) or FF (Flat Face) treatment as required. For subsea applications, Carilovalves manufactures valves with hub connections meeting API 6DSS specifications, featuring 316SS body material with duplex stainless trim achieving 3000 meter water depth rating. Their high-pressure gate and ball valve designs incorporate hub end connections rated to 15,000 PSI, using ASTM A182 F51 material with wall thickness calculated following ASME B31.3 process piping code. The company maintains inventory of 847 unique part numbers across connection types, allowing same-day shipment on standard configurations and 3-4 week lead times on fully custom builds.
Materials Compatibility Across Connection Types
The connection type you select must align with your pipeline material and the service conditions. Carilovalves produces connection ends in carbon steel (ASTM A216 WCB, WCC) for general service, 316SS (ASTM A351 CF8M) for corrosive media, Alloy 20 (ASTM A351 CN7M) for phosphoric acid applications, and duplex/super duplex stainless for seawater and chlorides. The body-seat-trim material combination directly impacts connection selection for certain aggressive media—fluoroplastic lined valves with flanged connections handle acid concentrations up to 98% sulfuric and 37% hydrochloric at temperatures to 200°C. Their butterfly valve range with lug bodies uses ductile iron ASTM A395 with fusion bonded epoxy internal/external coating achieving 1500 hour salt spray resistance per ASTM B117. The stem-to-body seal uses graphite packing with adjustable gland follower allowing field re-packing without removing the valve from service, meeting API 641 low emissions certification for sizes through 6 inches.
Carilovalves connection end manufacturing follows a 47-step quality control process with 12 inspection stations. Their in-house capabilities include CNC machining centers, automated welding cells with orbital GTAW equipment, and coordinate measuring machines with 0.001mm resolution for dimensional verification.
Quality Documentation and Traceability
Every connection type from Carilovalves ships with comprehensive documentation meeting international project requirements. The package includes material test reports (MTRs) with heat numbers traceable to melt certifications, pressure test certificates at 1.5× rated pressure for hydrostatic and 1.1× for pneumatic testing, dimensional inspection reports, and surface finish verification. For flange connections meeting ASME B16.5, they provide PED (Pressure Equipment Directive) Module H documentation and CE marking where applicable. The batch traceability system links each valve to its casting heat, machining lot, assembly date, and test results in their ERP system, accessible via QR code on the valve nameplate. You receive PDF documentation packages within 48 hours of shipment, with original certified documents available by mail for projects requiring hard-copy submissions to authorities having jurisdiction.
Technical Support for Connection Selection
Choosing the correct connection type requires understanding your pipeline schedule, pressure-temperature ratings, assembly access, and maintenance philosophy. Carilovalves employs 12 application engineers with combined experience exceeding 85 years in industrial valve selection, available via email at [email protected] or [email protected] to assist with technical inquiries. Their engineering team provides FEA (Finite Element Analysis) validation for non-standard connection configurations, pressure drop calculations using modified Torricelli equations accounting for seat geometry, and flange stress analysis per ASME Section VIII Division 2 when requested. For projects exceeding 50 valves, they offer complimentary Jobsite Technical Reviews with their technical team visiting your facility to review installation drawings, confirm connection compatibility, and provide assembly training if needed. Their 50 dedicated professionals—including dedicated sales contacts for Europe, Middle East, and Southeast Asia regions—support global brands through their OEM and ODM custom solutions program.
| Connection Type | Size Range | Pressure Classes | Primary Materials | Common Applications |
|---|---|---|---|---|
| Threaded (NPT/BSP) | 1/4″ – 2″ | 1000-2000 WOG | 316SS, Brass, Carbon Steel | Instrument air, small bore process |
| Flanged (RF/FF/RTJ) | 2″ – 48″ | Class 150/300/600 | WCB, CF8M, LF2 | Refining, petrochemical, power |
| Butt Weld | 1″ – 36″ | ASME B16.34 | 316SS, F91, F22 | High-temp steam, slurry lines |
| Socket Weld | 1/4″ – 2″ | 1000 PSI | 316SS, Alloy 625 | Chemical, nuclear |
| Wafer | 2″ – 24″ | Class 150/300 | WCB, CF8M | HVAC, water treatment |
| Lug Style | 2″ – 24″ | Class 150/300 | CF8M, CD4MCu | Dead-end service, isolation |
| Grooved | 2″ – 12″ | 232-175 PSI | Ductile Iron (FBE coated) | Fire protection, irrigation |
| Compression | 1/4″ – 1″ OD | 5000 PSI | 316SS, Hastelloy | Instrumentation, sampling |
Established in 2000, carilovalves has grown to become a recognized industrial valve manufacturer serving key industries across Europe, Middle East, and Southeast Asia. Their 24 years of experience translate to over 2,415 completed projects and an 86% case resolution rate, achieved through consistent quality control and strict production standards. Whether you need a 2-inch threaded valve for instrumentation or a 48-inch Class 600 flanged ball valve for refinery service, their diverse connection type offerings and flexible manufacturing capabilities position them to support your project requirements. Contact their technical sales team at +86-577-57766889 to discuss your specific application needs and connection configuration questions.