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        • ANSI 150# SS316 Y-strainer
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        • JIS 10K Cast Steel Y-strainer
      • Gate Valves >
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Stauff Test Couplings

Stauff test coupling is a product type that has been planned in advance for suitable positions of hydraulic system during the design phrase of a machine. Alternatively, it would be added at a later stage in the course of retrofitting or upgrading.

They allow machine fabricator and maintenance personnel to easily and safely connect analogue, digital measuring and display devices for short term testing or continuous monitoring of system pressure and other factors. They are allowed for venting of the system as well as collecting representative fluid sample if it is required. Example, it is applied to analyse the degree of contamination of the fluid.
Temperature Range
  • - 20°C to 100°C
  • - 20°C to 200°C
  • - 40°C to 150°C
Material
  • Carbon Steel Zinc Nickel Plated
  • Stainless Steel SS316
Working Pressure
  • ​Up to 630 bars
Connection
  • Metric Thread 
  • Inches Thread
CATALOGUE :

​​​​​- Stauff Test Couplings​


What are Stauff Test Coupling

​1. What is test coupling used for?

Test coupling connection does not require any tools to connect the coupling to the system. It can be carried out during operation under full system pressure which is up to 9135 psi or 630 bar. The working pressure is subjected to the type of coupling. It is used to monitor and control pressure. The connection thread is made according to ISO 15171-2 standard. It is applicable for high and low pressure systems. ​
Test coupling is closed with a threaded nipple in a fully automated process during operation production. It is not crimped after insertion of the internal valve components and seals which secures the proper and reliable functioning of the couplings under permanent load operation. The other competitive influence of using test coupling is the vibration protection feature which prevents self-loosening of the protective metal or plastic cap caused by vibrations in the system. 
Picture
​2. What is test coupling made of?
Picture
Test coupling body is made of carbon steel and stainless steel SS316. The ball material is stainless steel. The carbon steel zinc nickel surface coating provides a reliable surface protection to it. There are two type of material grades available for stainless steel.
​
  • Steel zinc/nickel plated – W3
  • Stainless steel 1.4305/AISI 303 – W4
  • Stainless steel 1.4571/AISI 316Ti – W5
3. What is the advantage of using test couplings? ​
The check valve integrated into the test coupling opens only after connection of the measuring and display device with suitable test hoses or adapters, which includes the complete product range. This guarantees a reliable and safe sealing of the connection without any risks of leakage or fluid escaping from the system.
​
  • Before ball check is open, it is leak-proof connection 
  • Simple connection to measurement, control and switching devices operation
  • Test system at system working pressure 
  • Self-locking metal protective cap
Picture
4. How to order test coupling? 

​There are three common sealing types to take note when ordering a test coupling.
Seal Materials 
NBR
FKM
EPDM
Equivalent
Buna-N
Viton
Ethylene Propylene Diene Monomer Rubber
Temperature Range (°C)
- 20°C to 100°C
 - 20°C to 200°C
- 40°C to 150°C
Temperature Range (°F)
 - 4°F to 212°F
- 4°F to 392°F
- 40°F to 302°F
Table 1: Seal Material
The test coupling is suitable for hydraulic oils and other mineral oil base fluids. User may consider compatibility of seal type material before installation. The complete test coupling is available with a hexagonal protection cap made of steel or plastic material.
Stauff Series 
Types
Connections
SMK-20 Type G
Test Coupling
Straight 24° Fitting 
SMK-20 Type K
Test Coupling
24° Taper / O-ring (DKO)
SMK-20 JIC Type K
Test Coupling
37° JIC Connection
SMK-20 JIC Type G
Test Coupling
Straight 37° JIC Connection
SGV-JIC Type FM
Swivel Run Tee
37° JIC Connection
SMK-20 Type ORFS
​Test Coupling
ORFS Connection
SSK-20
Bulkhead
-
SAD-20
Test Adaptor
-
SMA-20
SMD-20
Gauge Adaptor
-
Table 2: Test Coupling with Ball Check Order Option
Stauff Series 
Types
Connections
SKK-20
Test Coupling
Male Threaded Stud
SMK-20 Type G
Test Coupling
Straight 24° Fitting
SKK-20 Type K
Test Coupling
 24° Taper / O-ring (DKO)
SMK-15
Test Coupling
Male Threaded Stud
SMK-15 Type G
Swivel Run Tee
Straight 24° Fitting
 SMK-15 Type K
​Test Coupling
24° Taper / O-ring (DKO)
SSK-15
Bulkhead
-
SGV-JIC Type FM
Swivel Run Tee
37° JIC Connection
SAD-15
Test Adaptor
-
SMA-15
SMD-15
​Gauge Adaptor
-
Table 3: Test Coupling with Piston Valve Order Option

CATALOGUE :

​​​​​- Stauff Test Couplings​


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  • About
    • Core Values
  • Brands
    • Stauff
    • RFS Hydraulics
    • MHA Zentgraf
    • Eaton
    • AF Hydro
    • Oleo Tecnica
    • Inteva
    • Both-well
    • KPL Industry
  • Products
    • Pipes and Tubes >
      • Stainless Steel Tubes
      • Stainless Steel Pipes
      • Hydraulic Steel Tubes
      • Copper Pipes
      • Copper Coils
      • Walform Tube
    • Pipe Clamps >
      • Stauff Clamps
      • Tubeclo Tube Clamps
      • Stauff Anti Corrosion Clamps
      • Tubeclo Rubber Insert Clamps
    • Flanges >
      • Hydraulic SAE Flanges
      • Square Flanges
    • High Pressure Valves >
      • High Pressure Ball Valves
      • SAE Flange Check Valves
      • Needle Valves
      • SAE Flange End Ball Valves
      • High Pressure Check Valves
      • ISO 6164 Ball Valves
    • High Pressure Fittings >
      • Compression Fittings
      • Ferrule Fittings
      • Forged Pipe Fittings
      • JIC Fittings
      • Quick Release Couplings
      • Pipe Adapter Fittings
    • Low Pressure Valves >
      • Ball Valves >
        • 1 Piece Ball Valve
        • 2 Piece Ball Valve
        • 3 Piece Ball Valve
        • L-Port Ball Valve
        • T-Port Ball Valve
        • Brass Ball Valve
        • Brass Mini Ball Valve
        • Stainless Steel Mini Ball Valve
      • Flange End Ball Valves >
        • PN10/16 SS316 Flange End Ball Valve
        • ANSI 150# SS316 Flange End Ball Valve
        • ANSI 300# SS316 Flange End Ball Valve
        • JIS 10K SS316 Flange End Ball Valve
        • ANSI 150# Cast Steel Flange End Ball Valve
        • ANSI 300# Cast Steel Flange End Ball Valve
      • Swing Check Valves >
        • ANSI 150# SS316 Swing Check Valves
        • JIS 10K SS316 Swing Check Valves
        • ANSI 150# Cast Steel Swing Check Valve
        • Threaded End SS316 Swing Check Valves
        • Threaded End Brass Swing Check Valves
      • Single Plate Check Valves
      • Dual Plate Check Valves
      • Spring Check Valves
      • Y-Strainers >
        • ANSI 150# SS316 Y-strainer
        • JIS 10K SS316 Y-strainer
        • Threaded End SS316 Y-strainer
        • ANSI 150# Cast Steel Y-strainer
        • JIS 10K Cast Steel Y-strainer
      • Gate Valves >
        • ANSI SS316 150# Gate Valve
        • JIS 10K SS316 Gate Valve
        • Threaded End SS316 Gate Valve (200 PSI)
        • Threaded End SS316 Gate Valve (800 PSI)
        • ANSI 150# Cast Iron Gate Valve
        • JIS 10K Cast Iron Gate Valve
        • ANSI 150# Cast Steel Gate Valve
        • ANSI 150# Forged Steel Gate Valve
        • Threaded End Forged Steel Gate Valve
        • Welded End Forged Steel Gate Valve
      • Globe Valves >
        • ANSI 150# SS316 Globe Valve
        • JIS 10K SS316 Globe Valve
        • Threaded End SS316 Globe Valve (200 PSI)
        • Threaded End SS316 Globe Valve (800 PSI)
        • ANSI 150# Cast Iron Globe Valve
        • JIS 10K Cast Iron Globe Valve
        • ANSI 150# Cast Steel Globe Valve
        • ANSI 150# Forged Steel Globe Valve
        • Threaded End Forged Steel Globe Valve
        • Welded End Forged Steel Globe Valve
      • Butterfly Valves >
        • ANSI 150# Cast Iron Butterfly Valve
    • Low Pressure Fittings >
      • Class 150 Fittings
      • Camlock Fittings
      • Copper Fittings
    • Accessories >
      • Pressure Gauges
      • Stauff Test Couplings
      • Walform Machine
      • GS Retain Ring
      • Anti-bloc Fett
      • Stauff Tube Clean Systems
      • Dowty Seals
      • Stauff Level Gauge
      • Stauff Filler Breathers
  • Catalogues
    • Pipes and Tubes
    • Pipe Clamps
    • Flanges
    • High Pressure Valves
    • High Pressure Fittings
    • Low Pressure Valves
    • Low Pressure Fittings
    • Accessories
  • Contact
  • MYREWARDS
    • MYFAQ