Double Ferrule Instrumentation Tube Fittings

Product Details:

Instrumentation tube fittings are used to quickly and easily produce leak-free tube connections. Double ferrule compression fittings are available in metric and fractional tube sizes and include: An exterior nut. Two deformable ferrules in soft alloy or non-ferrous metals. A tube fitting body.

Additional Information:

• Production Capacity: 1000 piece
• Delivery Time: READY STOCK
• Packaging Details: HDPE BOX | Corrugated Box | Wooden Box

Product Details:

OD to NPT Male Connector (SS) – Technical Overview
A Stainless Steel (SS) OD to NPT Male Connector is a tube fitting designed to connect a tube (measured by OD – outer diameter) to a female NPT threaded port, using a double ferrule compression system on the tube side and a tapered NPT thread on the male end.
🧩 What It Does
This fitting allows a smooth transition from a tube (metric or inch) to an NPT female threaded port, commonly found in:

Valves

Manifolds

Instrumentation equipment

Pressure transmitters

Pneumatic or hydraulic systems

📐 1. Typical Configuration [ Tube OD Side ] ──[ Compression Nut + Ferrules ]──┬──[ Body ]──┬── NPT Male Thread 🔩 2. Technical Specifications ParameterDescriptionTube SideCompression fitting for tube ODThread SideMale NPT (tapered thread per ANSI B1.20.1)MaterialStainless Steel 316 (SS316 / SS316L)Sizes (Tube OD)1/4", 3/8", 1/2", 3/4", 1" / 6mm to 25mmSizes (NPT Thread)1/8", 1/4", 3/8", 1/2", 3/4", 1"Pressure RatingUp to 6000 psi (varies by size)Temperature Range-50°C to +400°CReusabilityYes (multiple assembly cycles possible)🔧 3. Common Size Examples Tube ODNPT Male ThreadPart Description1/4"1/4" NPT MaleOD to 1/4" NPT Male Connector3/8"1/4" or 3/8" NPTOD to NPT Male Connector1/2"1/2" NPT Male1/2" OD to 1/2" NPT Male6mm1/4" NPT MaleMetric OD to NPT Thread12mm1/2" NPT MaleMetric to Inch Thread Connection📦 4. Example Part Number Format FormatExampleMeaningMC-SS-8-4N1/2" Tube OD × 1/4" NPT MMale Connector, Stainless, 8 = 1/2", 4N = 1/4" NPTMC-SS-10MM-1/4N10mm Tube × 1/4" NPT MMetric-to-Inch connector🏷️ 5. Alternate Naming

Male Connector

Tube to Male NPT Connector

OD to NPTM Compression Adapter

Compression × Male NPT Connector

✅ 6. Features

Double ferrule design ensures leak-free performance

Vibration-resistant

No welding or threading on tube side

High-pressure and temperature capable

Reusability for maintenance or rework

🧪 7. Typical Applications

Instrumentation lines

Pressure transmitters

Control panels

Hydraulic skids

Gas sampling systems

Chemical dosing systems

🏢 8. Brands / Manufacturer Equivalents BrandSeries / Model NameKALPATARU

Product Details:

Instrumentation tube fittings are precision-engineered components used to connect sections of tubing in systems requiring high accuracy, reliability, and leak-free performance. Typically used in high-pressure, corrosive, or sensitive fluid/gas systems, these fittings are ideal for instrumentation, control, and analytical applications.

Made from Stainless Steel (typically SS 316 or SS 304), they offer excellent corrosion resistance, pressure integrity, and long service life.

• Material:

  • SS 316/316L – High corrosion resistance, ideal for chemical and offshore applications

  • SS 304 – General-purpose corrosion-resistant material

• Design:

  • Double Ferrule (front and back ferrule) for a leak-tight metal-to-metal seal

  • Available in single ferrule systems as well

• Connection Types: Tube-to-tube, tube-to-male/female thread, bulkhead, elbows, tees, crosses, reducers

• Thread Types: NPT, BSP, BSPT, ISO, UNF, Metric

• Leak-proof connections under vacuum, high pressure, and thermal cycling

• Reusable and easy to disassemble/reassemble

• No need for welding or soldering

• High resistance to corrosion, pressure, and vibration

• Precision machining ensures alignment and dimensional accuracy

• Suitable for hazardous and clean-room environments

• Male Connector

• Female Connector

• Bulkhead Union

• Reducing Union

• Elbow (90°, 45°)

• Tee (Union Tee, Branch Tee, Run Tee)

• Cross Tee

• Tube Caps & Plugs

• Weld Fittings (Butt Weld, Socket Weld)

• Oil & gas and offshore platforms

• Petrochemical and chemical industries

• Power generation and steam systems

• Pharmaceuticals and biotechnology

• Instrumentation panels and skids

• Gas chromatography and analytical systems

• Food & beverage and water treatment

• Kalpataru Pipe & Fittings

Additional Information:

• Delivery Time: READY STOCK

Product Details:

Swagelok Instrumentation Tube Fittings are industry-standard, high-quality mechanical grip fittings designed for leak-tight connections in high-pressure and high-purity fluid systems. These fittings use a double ferrule design, providing robust sealing performance and reusability in critical industries such as oil & gas, chemical processing, pharmaceuticals, and semiconductors.

• Proven leak-tight performance, even under vibration, pressure cycling, and thermal shock

• Reusability – can be disassembled and reassembled multiple times

• Excellent corrosion resistance

• Easy to install with standard tools (Swagelok gap inspection gauge ensures proper assembly)

• Interchangeability not guaranteed with other brands (Swagelok discourages mixing due to design tolerances)

• Instrumentation panels

• Analyzer systems

• Hydraulic and pneumatic systems

• High-purity gas and liquid delivery

• Offshore oil & gas skids

• Biotech, semiconductor, and food industries

SS-400-1-4

• SS = Stainless Steel

• 400 = 1/4" tube OD

• 1-4 = 1/4" NPT Male Thread

Additional Information:

• Packaging Details: Box

Product Details:

Additional Information:

• Production Capacity: 1000
• Delivery Time: 15 DAYS

Product Details:

• A straight tube-to-tube connector

• Both ends accept OD tubes using double ferrule compression (front + back ferrule)

• Designed for reliable, reusable, and leak-tight sealing

SS316 Tube Union, 1/4" OD x 1/4" OD, Double Ferrule, 6000 psi, ASTM A276, Kalpataru Compatible

• Instrumentation tubing systems

• Oil & gas pipelines (sample or impulse lines)

• Chemical and petrochemical industries

• Hydraulic control systems

• Food, pharma, and biotech (with electropolished variants)

• Laboratory and gas analysis setups

Product Details:

A Stainless Steel Weld Nipple Cross Tee is a specialized piping component that combines a cross (four-way junction) with integrated weld nipples on all four ends. It is designed for permanent, high-strength, and leak-proof connections in high-pressure, high-temperature, or corrosive piping systems.

• Material:

  • Stainless Steel 304 / 304L / 316 / 316L

  • Compliant with ASTM A403 (for wrought fittings) or ASTM A182 (for forged fittings)

  • 316/316L preferred in corrosive or marine environments

• Design:

  • Cross-shaped body with integral nipples on all four ends

  • Nipples can be:

    • Plain ends for butt welding

    • Beveled ends as per ASME B16.25 for field welding

    • Optional threaded ends (less common)

• Size Range:

  • Nominal Pipe Sizes (NPS): 1/4" to 4"

  • Nipple lengths typically: 100mm, 150mm, 200mm, or custom

• Wall Thickness (Schedule):

  • Sch 40, Sch 80, Sch 160, or XXS

  • Determines pressure rating

• Pressure & Temperature Rating:

  • Based on pipe schedule and material grade

  • Suitable for ANSI Class 150 to 2500

• Oil & gas and refinery pipelines

• High-pressure steam systems

• Chemical and petrochemical plants

• Marine and offshore installations

• Power generation and boiler piping

• Clean utility or process distribution lines

Product Details:

1. Fitting Body

2. Front Ferrule (seals the tube)

3. Back Ferrule (grips the tube)

4. Nut (tightens the ferrules onto the tube)

• Stainless Steel 316 or 304

  • SS316 is preferred for chemical, marine, and high-corrosion environments.

  • SS304 is suitable for less aggressive applications.

• Tubing Outer Diameter (OD):

  • Metric: 6mm, 8mm, 10mm, 12mm, etc.

  • Imperial: 1/8", 1/4", 3/8", 1/2", 3/4", 1", etc.

• Thread Types:

  • NPT, BSPT, BSPP, UNF, etc.

• Can handle up to 6000 psi or higher, depending on the tube size and material.

• Always check the manufacturer's pressure rating chart.

• Oil & Gas

• Instrumentation

• Hydraulics & Pneumatics

• Chemical Processing

• Pharmaceutical and Food Industries

• Leak-tight, gas-tight seal

• Withstand high pressure, temperature, and vibration

• Corrosion resistance

• No welding or soldering required

• Reusable and easy to assemble/disassemble

1. Cut the tubing square and debur it.

2. Insert the tube into the fitting until it bottoms out.

3. Tighten the nut 1 1/4 turns past hand-tight (initial installation).

4. Mark the nut to track rotation if needed.

5. Test for leaks after assembly.

• KALPATARU

Additional Information:

• Production Capacity: 100
• Delivery Time: READY STOCK
• Packaging Details: HPDE BOX

Product Details:

• SS 316 (Stainless Steel 316):

  • Excellent corrosion resistance

  • Suitable for marine, chemical, and high-temperature applications

  • Contains molybdenum for better pitting resistance than SS 304

• Male Connector:

  • One end has male threads (typically NPT, BSPT, or metric)

  • The other end is a tube fitting (compression or ferrule-type) to connect to seamless tubing

• 1/4" x 1/4" NPT

• 3/8" x 3/8" NPT

• 1/2" x 1/2" NPT

• 6 mm x 1/4" BSPT

• 12 mm x 1/2" BSPT
  (Other metric and inch combinations available)

• Oil & gas

• Petrochemical

• Instrumentation panels

• Hydraulic systems

• Water treatment

Product Details:

Stainless Steel Double Ferrule Tube Fittings are high-performance compression fittings widely used in industries such as oil & gas, petrochemical, power, and instrumentation for leak-proof connections in high-pressure fluid and gas systems.

They are mechanical fittings used to join two pieces of tubing or to connect tubing to other components. The "double ferrule" design ensures a tight, vibration-resistant seal.

• Material: Typically made from 316 stainless steel for excellent corrosion resistance.

• Components:

  1. Nut

  2. Front Ferrule

  3. Back Ferrule

  4. Body

• Leak-tight seal under high pressure and vacuum

• Easy to install and reassemble

• Withstands vibration and thermal cycling

• No welding or threading needed

• Suitable for metric and imperial tubing

• Tube OD: 1/16” to 2” (or 2 mm to 50 mm)

• Pressure rating: Up to 6,000 psi (varies by size and wall thickness)

• Instrumentation systems

• Hydraulic & pneumatic systems

• Gas and liquid chromatography

• Offshore and subsea equipment

• Power generation & process plants

• Swagelok®

• Parker A-LOK®

• Kalpataru 

Additional Information:

• Item Code: 7307
• Production Capacity: 10000 PCS
• Delivery Time: READ STOCK
• Packaging Details: Wooden Box, HPDE Box

Product Details:

A Stainless Steel Ermeto Elbow is a high-pressure tube fitting designed to connect two lengths of hydraulic tubing or pipes at a 90° (right-angle) or 45° bend. It belongs to the Ermeto tube fitting system, known for its bite-type ring design that ensures leak-free, vibration-resistant connections.

• Material:

  • Stainless Steel 316Ti or 316 / 304

  • According to DIN EN 1.4571 / 1.4401 / 1.4301

  • Corrosion-resistant, suitable for aggressive media and harsh environments

• Connection Type:

  • DIN 2353 (Ermeto Standard)

  • Metric tube sizes with cutting ring (bite-type) technology

  • Optional: Male/female thread × tube ends (e.g., BSP, NPT, or Metric)

• Angle:

  • 90° Elbow (most common)

  • 45° Elbow (optional)

• Tube OD Sizes:

  • Metric sizes: 6 mm to 42 mm

  • Pressure series:

    • LL (Light-Light): for low-pressure applications

    • L (Light): up to 315 bar

    • S (Heavy): up to 630 bar

• Thread Options (if applicable):

  • Metric (M thread)

  • BSPP (G thread)

  • NPT (on request)

  • UNF (SAE)

• Standards:

  • DIN 2353 / ISO 8434-1

  • Compatible with Parker Ermeto, Stauff, Eaton Walterscheid, etc.

• Hydraulic and pneumatic systems

• Offshore and marine systems

• Instrumentation and process control

• Oil & gas, chemical, and power generation

• Mobile and industrial machinery

• High-pressure resistance (up to 630 bar)

• Leak-free, metal-to-metal seal – no O-rings needed

• Withstands vibration and thermal cycling

• Easy to install with proper ferrule tightening

• Compact and durable design

Additional Information:

• Packaging Details: HPDE BOX

Product Details:

This is a tube-to-male-thread adapter:

• One end connects to 1/2" OD tubing via double ferrule compression (e.g., Swagelok-type).

• The other end has a 1/2" NPT male thread to connect to a female-threaded port (e.g., valve, manifold, or pipe).

• Instrumentation panels

• Pneumatic & hydraulic systems

• Oil & gas installations

• Chemical processing

• Gas distribution systems (oxygen, nitrogen, etc.)

• Compression Male Connector 1/2" OD x 1/2" NPT(M)

• 1/2" Tube x 1/2" NPT Male Adapter

• Double Ferrule Tube Fitting

Product Details:

Single ferrule hydraulic fittings are mechanical fittings designed to create leak-proof connections on tubes or pipes in hydraulic systems. The single ferrule acts as a gripping and sealing component, compressing onto the tube when the nut is tightened, forming a strong and pressure-resistant joint without welding.

• Quick and easy installation without welding or flaring

• High pressure, leak-tight seal suitable for hydraulic applications

• Reusable ferrules in some designs (depending on manufacturer)

• Cost-effective compared to double ferrule fittings in some applications

• Compact design for tight spaces

• Tube OD: 1/8” up to 2” or larger depending on manufacturer

• Thread sizes vary by standard (NPT, BSP, JIC, etc.)

• Hydraulic machinery and equipment

• Mobile hydraulic systems (construction, agriculture)

• Industrial automation

• Fluid power systems in manufacturing

• Aerospace and automotive hydraulic lines

Product Details:

A male connector is a threaded pipe fitting with external (male) threads on one or both ends, used to connect pipes, tubes, or hoses to female-threaded components in piping and instrumentation systems. Made from stainless steel, these connectors offer excellent strength, corrosion resistance, and durability.

• Material: Stainless Steel 304, 316, or 316L (common grades)

• Thread Types:

  • NPT (National Pipe Thread Tapered) – Most common in the US

  • BSP / BSPT (British Standard Pipe Threads) – Common internationally

  • Metric Threads (less common for pipe fittings)

• Sizes: From 1/8” up to 4” or larger, depending on application

• Connection: Male external threads on one or both ends

• Design: Straight connectors or reduced size (reducer) male connectors

• Standards: ASTM A182, ASME B1.20.1, ISO 7-1, ISO 228-1

• Excellent corrosion resistance for harsh environments

• Durable, strong mechanical connection

• Easy to install and remove with standard tools

• Compatible with a variety of piping systems and fluids

• Suitable for high-pressure and temperature applications

• Process piping and instrumentation

• Chemical, petrochemical, and oil & gas plants

• Hydraulic and pneumatic systems

• Water treatment and marine applications

• Food and beverage industries

• Kalpataru Pipe & Fittings

Additional Information:

• Packaging Details: WOODEN BOX , HPDE BOX

Product Details:

 KALPATARU ^{compression tube fittings are double ferrule-type fittings  which provide 
leak-proof, torque-free seals at the tubing connection.
They provide  safety and  eliminate hazardous leaks of fluids in the 
instrumentation field for a process, pressure, hydraulic, and other applicable tubing systems
 
Types
Tube to Union, Tube to  Male, Tube to Female, Instrument Pipe Fittings, Accessories
Equivalent To
SWAGELOK, PARKER, DK-LOK, HOKE
Grade
SS304 & SS316
Sizes
1/8’’ to 2’’ and 3mm to 50mm
Ends
Threaded, Welding, JIC
Pressure Rating
1000 Psi, 3000 Psi, 6000 Psi, and 10000 Psi
Threads
NPT, BSPT, and BSP
HS CODE
73072900}
 

Additional Information:

• Delivery Time: READY STOCK

Product Details:

A Stainless Steel Double Ferrule Union Tee is a high-precision instrumentation tube fitting that provides a leak-tight, mechanically secure connection between three tubing sections. The double ferrule design ensures both a primary seal and a mechanical grip, making it ideal for high-pressure and high-accuracy applications in process instrumentation.

• Body: Stainless Steel SS 316 / SS 316L

• Ferrules: SS 316

• Nut: SS 316

• Compatible with stainless steel tubing and instrumentation components

• Double Ferrule System:

  • Front Ferrule: Creates primary seal against fitting body

  • Back Ferrule: Grips the tube to prevent pull-out and vibration-induced leakage

• Union Tee: Allows easy assembly/disassembly of tubing without cutting

• Compact and corrosion-resistant design

• Suitable for high-pressure service

• Reusable after disassembly

• Tube Sizes: 1/8", 1/4", 3/8", 1/2", etc. (custom sizes available)

• Pressure Rating: Up to 6000 psi (depending on tube size and material)

• Temperature Rating: As per material and application

• End Connections: Tube-to-tube

• Standards: Machined to international instrumentation fitting standards

• Instrumentation tubing systems

• Pressure and differential pressure transmitters

• Oil & gas, chemical, and petrochemical plants

• Power plants and refineries

• Hydraulic and pneumatic systems

Product Details:

 KALPATARU ^{compression tube fittings are double ferrule-type fittings  which provide 
leak-proof, torque-free seals at the tubing connection.
They provide  safety and  eliminate hazardous leaks of fluids in the 
instrumentation field for a process, pressure, hydraulic, and other applicable tubing systems
 
Types
Tube to Union, Tube to  Male, Tube to Female, Instrument Pipe Fittings, Accessories
Equivalent To
SWAGELOK, PARKER, DK-LOK, HOKE
Grade
SS304 & SS316
Sizes
1/8’’ to 2’’ and 3mm to 50mm
Ends
Threaded, Welding, JIC
Pressure Rating
1000 Psi, 3000 Psi, 6000 Psi, and 10000 Psi
Threads
NPT, BSPT, and BSP
HS CODE
73072900}

Additional Information:

• Delivery Time: READY STOCK

Product Details: