Navigate the full tubes & instrumentation reference below.
Tubes and instrument fittings are precision-engineered components for instrumentation, hydraulic and pneumatic systems requiring leak-tight connections in process control applications. Kennkrupps supplies a comprehensive range of instrument fittings, tube fittings, hydraulic fittings and instrumentation valves for oil & gas, chemical, petrochemical, power and process industries.
Manufactured as per ISO 8434, SAE J512/J514/J516, DIN 2353 and other international standards in stainless steel, carbon steel, brass and special alloys.
Precision fittings for instrumentation, hydraulic and pneumatic systems.
Ferrule grip on tube. Instrumentation, analytical and hydraulic service.
Two-ferrule grip on tube for critical, high-pressure instrumentation.
37° flare connection for hydraulic, pneumatic and fuel lines.
45° flare connection for automotive, refrigeration and general use.
Cutting ring grips the tube. Hydraulic and pneumatic, 4mm to 42mm.
Push-in assembly without tools for pneumatic and low-pressure service.
Crimped or reusable connections on hose for hydraulic systems and mobile equipment.
Rapid connect/disconnect for hydraulic, pneumatic and fluid transfer.
Convert between fitting types and end connections in one assembly.
Panel-mount connections through enclosure and manifold walls.
Precision valves for pressure control, isolation and sampling in instrumentation systems.
| Valve Type | Function | Pressure Rating | Size Range | Applications |
|---|---|---|---|---|
| Needle Valves | Precision flow control | Up to 20,000 psi | 1/8" to 1" | Instrumentation, sampling, calibration |
| Ball Valves | On/Off flow control | Up to 10,000 psi | 1/8" to 2" | General instrumentation, isolation |
| Manifold Valves | Multiple valve functions | Up to 10,000 psi | 1/2" to 1" | Pressure transmitter, flow measurement |
| Check Valves | Prevent backflow | Up to 10,000 psi | 1/8" to 1" | Pump discharge, compressor outlet |
| Relief Valves | Overpressure protection | Up to 10,000 psi | 1/4" to 1" | System protection, safety |
| Metering Valves | Precise flow adjustment | Up to 10,000 psi | 1/8" to 1/2" | Laboratory, analytical, calibration |
| Manifold Type | Configuration | Application |
|---|---|---|
| 2-Valve Manifold | Block & Bleed | Pressure transmitter isolation |
| 3-Valve Manifold | 2 Block + 1 Equalize | Differential pressure transmitter |
| 5-Valve Manifold | 2 Block + 2 Equalize + 1 Bleed | Differential pressure with calibration |
| Direct Mount Manifold | Direct transmitter mounting | Compact installation |
| Remote Mount Manifold | Piped connection to transmitter | Flexible installation |
Double ferrule dimensions — metric (ISO 8434-1) and imperial (NPT) — switch between tabs.
| Tube OD (mm) | Thread (Metric) | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 4 | M10×1 | 12 | 14 | 10 | 27 | 11 | 0.015 |
| 6 | M12×1.5 | 14 | 17 | 12 | 32 | 14 | 0.025 |
| 8 | M14×1.5 | 17 | 19 | 14 | 36 | 17 | 0.035 |
| 10 | M16×1.5 | 19 | 22 | 17 | 41 | 19 | 0.050 |
| 12 | M18×1.5 | 22 | 24 | 19 | 44 | 22 | 0.065 |
| 14 | M20×1.5 | 24 | 27 | 22 | 50 | 24 | 0.085 |
| 16 | M22×1.5 | 27 | 30 | 24 | 55 | 27 | 0.110 |
| 18 | M24×1.5 | 30 | 32 | 27 | 60 | 30 | 0.140 |
| 20 | M26×1.5 | 32 | 36 | 30 | 65 | 32 | 0.175 |
| 22 | M30×2 | 36 | 41 | 36 | 75 | 36 | 0.240 |
| 25 | M36×2 | 41 | 46 | 41 | 85 | 41 | 0.320 |
| 28 | M42×2 | 46 | 50 | 46 | 95 | 46 | 0.420 |
| 30 | M45×2 | 50 | 55 | 50 | 100 | 50 | 0.500 |
| 32 | M48×2 | 55 | 60 | 55 | 110 | 55 | 0.600 |
| 38 | M52×2 | 60 | 65 | 60 | 120 | 60 | 0.750 |
| 42 | M60×2 | 65 | 75 | 65 | 130 | 65 | 0.950 |
| Tube OD (Inch) | Thread (NPT) | A (Inch) | B (Inch) | C (Inch) | D (Inch) | Weight (lbs) |
|---|---|---|---|---|---|---|
| 1/16" | 1/8" | 0.47 | 0.55 | 0.39 | 1.06 | 0.03 |
| 1/8" | 1/8" | 0.55 | 0.67 | 0.47 | 1.26 | 0.05 |
| 3/16" | 1/4" | 0.63 | 0.75 | 0.55 | 1.42 | 0.07 |
| 1/4" | 1/4" | 0.75 | 0.87 | 0.67 | 1.61 | 0.11 |
| 3/8" | 3/8" | 0.87 | 0.94 | 0.75 | 1.73 | 0.14 |
| 1/2" | 1/2" | 1.06 | 1.18 | 0.94 | 2.17 | 0.24 |
| 5/8" | 5/8" | 1.18 | 1.30 | 1.06 | 2.36 | 0.31 |
| 3/4" | 3/4" | 1.30 | 1.42 | 1.18 | 2.56 | 0.39 |
| 7/8" | 7/8" | 1.42 | 1.61 | 1.30 | 2.95 | 0.53 |
| 1" | 1" | 1.61 | 1.81 | 1.42 | 3.35 | 0.71 |
| 1-1/4" | 1-1/4" | 1.81 | 2.05 | 1.61 | 3.74 | 0.95 |
| 1-1/2" | 1-1/2" | 2.05 | 2.36 | 1.81 | 4.33 | 1.32 |
| Material | Specification | Applications | Temp Range | Pressure Rating |
|---|---|---|---|---|
| Stainless Steel 316 | ASTM A182 F316 | Marine, chemical, high corrosion | -196°C to 800°C | Up to 20,000 psi |
| Stainless Steel 316L | ASTM A182 F316L | Welded, high corrosion | -196°C to 800°C | Up to 20,000 psi |
| Stainless Steel 304 | ASTM A182 F304 | General corrosion resistance | -196°C to 800°C | Up to 20,000 psi |
| Stainless Steel 304L | ASTM A182 F304L | Welded assemblies | -196°C to 800°C | Up to 20,000 psi |
| Alloy 625 (Inconel) | ASTM B564 N06625 | Aerospace, extreme corrosion | -196°C to 1000°C | Up to 20,000 psi |
| Alloy 600 (Inconel) | ASTM B564 N06600 | High-temperature, oxidation | -196°C to 1100°C | Up to 20,000 psi |
| Hastelloy C276 | ASTM B574 N10276 | Severe corrosion | -196°C to 450°C | Up to 20,000 psi |
| Monel 400 | ASTM B564 N04400 | Marine, hydrofluoric acid | -196°C to 450°C | Up to 20,000 psi |
| Brass | ASTM B16 | General purpose, low pressure | -20°C to 200°C | Up to 3,000 psi |
| Carbon Steel | ASTM A108 | Hydraulic, pneumatic | -29°C to 425°C | Up to 10,000 psi |
| Duplex F51 | ASTM A182 F51 | Offshore, seawater | -50°C to 300°C | Up to 20,000 psi |
| Super Duplex F53 | ASTM A182 F53 | High-pressure seawater | -50°C to 300°C | Up to 20,000 psi |
Process instrumentation and control, hydraulic power units, chemical injection systems and wellhead control panels.
Analytical and sampling systems, pharmaceutical and biotech processing, food and beverage processing.
Marine and offshore platforms, aerospace and defense, semiconductor manufacturing and power plants.
Certified manufacturing management system guaranteeing process control and traceability.
Pressure Equipment Directive 2014/68/EU and NACE MR0175 / MR0103 sour service materials.
Mill Test Certificates EN 10204 3.1/3.2 with every shipment. TPI available as required.
Every fitting pressure tested. Helium leak testing available for critical vacuum applications.
Positive Material Identification and salt spray testing available on demand for critical service.
Every fitting dimensionally verified and marked with grade, standard and lot traceability.
Complete range of tube fittings, hydraulic fittings and instrument valves.
316 SS, 304 SS, alloy 625, Hastelloy, Monel, duplex, brass.
Up to 20,000 psi (1,379 bar).
100% inspection and pressure testing, MTC with every shipment.
Ready stock for common sizes and configurations.
Made to drawing and specifications.
Direct from manufacturer.
Expert guidance on selection and specifications.
Our team can help with fitting selection, materials, pressure ratings, custom manufacturing and technical consultation.