HOKE is a Manufacturer of Precision Fluid Control Solutions

Instrument Valves
  • 6100/6200 Series
  • 691F Series
  • General Purpose Ball Valve
  • Bleed Valves
  • Check Valves
  • CVH Series
  • Excess Flow Valves
  • Gauge Valves
  • High Cycle Ball Valve
  • Metering Valves
  • Needle Valves
  • Relief Valves
  • Packless Valves
  • Plug Valves


All Products Range :

  • Tube Fittings & Pipe Fittings
    • GYROLOK Tube Fittings
    • Pipe Fittings
  • Valves
    • Ball Valves
    • Needle Valves
    • Flow & Fluid Control Components
    • Packless Valves
    • Metering Valves
    • Plug Valves
    • Manifolds
    • Gauge Valves
    • Hand Valves
    • Double Block & Bleed Valves
    • HOKEBlock Valves
    • HOKE Monoweld Valves
  • Flanges & Monoflanges
  • Actuators
    • Space Saver Actuators
    • Electric Actuators
    • Pneumatic Actuators
  • Sampling Cylinders
    • Spun Sampling Cylinders
    • Formed Sampling Cylinders
    • Sampling Cylinder Valves and Accessories
  • HQC Quick Couplings
  • Hydraulic Regulators
  • Tools & Misc.




Alternative Fuels Market

HOKE has offers many years of experience designing and manufacturing high quality, high pressure fluid control components for the alternative fuels industry. You’ll find our technology used in alternative fuels passenger vehicles, trucks, buses, filling stations, ethanol refineries, and hydrogen fuel cells. As this industry continues to expand, we are prepared to help promote and commercialize new opportunities. Our team of alternative fuel specialists can help you design flow control solutions that will specifically meet your requirements.


HOKE holds a variety of international regulatory certifications for alternative fuels including: PED, EIHP, ECE R110, ASME B31, and PRD-1.

Chemical & Petrochemical Markets

HOKE realizes that no two plants are exactly alike and can offer you custom designed solutions to meet your unique process flow control component requirements. You can find HOKE’s time-tested designs in hundreds of plants worldwide. From research laboratories to pilot plants, HOKE components deliver leak-tight performance.

Products for Chemical / Petrochemical

HOKE fluid process components include patented GYROLOK® tube fittings, pipe fittings, as well as ball, bellows, needle, and plug valves; in-line filters, instrumentation manifolds and sampling cylinders. Material choices include 316 stainless steel, Monel®, Hastelloy® C, Inconel®, Duplex, Super-Duplex, 6 SMO and various other exotic metals.

OEM Applications

HOKE fluid process components are the trusted design for a wide variety of OEM Equipment and Machinery applications including pollution control equipment, analyzers, test stands, oil and gas control skids, and gas turbine controls. Whether you need a standard component or a customized design for your project, HOKE OEM specialists can help.

Products for OEM Applications

HOKE fluid process control components for OEM applications include patented GYROLOK® tube fittings and pipe fittings; as well as ball, check & relief, needle, and plug valves; and quick couplers. Material choices include 316 stainless steel, Monel®, and Hastelloy® C.

Oil and Gas Markets

You can find HOKE fluid control solutions on applications ranging from well head to pipeline transportation and points in between. HOKE components are manufactured from time-tested designs that offer outstanding leak-tight performance. If you have a fluid process control requirement for oil and gas exploration, offshore platforms, refining, or pipeline.GYROLOK® tube fittings are available in Super Duplex 2507 alloy for superior corrosion resistance in sour gas applications. 2700 Series needle valves are designed specifically for sour gas service.

Products for Oil and Gas

HOKE fluid process solutions offers leak-tight performance for oil and gas production. Components include patented GYROLOK® tube fittings, pipe fittings; ball, bellows, metering, and needle valves, in-line filters, manifolds, sampling cylinders, and quick couplers. Material choice.

Power Generation Markets

From fossil fuel power generation to nuclear power plants, HOKE offers a full line of fluid process control components. HOKE’s time tested designs deliver outstanding leak-tight performance in a wide range of applications, including fossil fuel, specialty gas and steam plants. Whether you are commodity driven or have specialized flow control requirements, HOKE’s team of power generation professionals can assist with you retrofitting an existing process, or to design or build a new one.

Products for Power Generation

HOKE power generation products include patented GYROLOK® tube and pipe fittings, as well as ball valves, bellows & packless valves, check & relief valves, and needle valves; and sampling cylinders. Material choices include 316 stainless steel, Monel®, and Hastelloy® C.

Pulp and Paper Markets

Whether your application is batch or continuous processing, fluid transfer, mixing or plant utilities, HOKE fluid process control components offer outstanding leak-tight performance in a wide range of applications. HOKE’s outstanding leak-tight components can help reduce emissions and reduce the possibility of falling out of compliance with environmental regulations. Our team of Pulp and Paper experts is ready to assist you with your fluid process requirements.

Products for the Pulp and Paper Industry

HOKE fluid process control components for the Pulp and Paper industry include patented GYROLOK® fittings, in-line filters, ball and needle valves; and sample cylinders. Material choices include 316 stainless steel, Monel®, Hastelloy® C, Inconel®, Duplex, Super-Duplex, 6 SMO and various other exotic materials.





Hoke Gyrolok Compression Fittings

HOKE Gyrolok Compression Fittings or tube fittings have been carefully designed and manufactured to provide outstanding leak-tight integrity in a wide range of applications. The fittings provide safe, reliable performance from cryogenic temperatures to high temperature bake out levels, depending on material.

A key feature with Gyrolok tube fittings is that you can remake the fitting. With traditional compression fittings when you inset the tube into the fitting it bottoms out, forming a right angle [between the tube and the fitting] which leaves no additional space for movement as you tighten the fitting down. Since you are pushing the tube forward as you tighten it, this tends to lead to the tube galling or sticking (commonly known as a “tube sticking”). This can results in longer down times due to the need to cut out the valve or fitting that the tube is stuck in and replacing with a new valve or fittings.

Gyrolok tube fittings have a slight taper (sizing angle) at the base of the fitting allowing the tube to stop before bottoming out, yet still allows the tube room to move forward as the nut is tightened, thereby reducing the tendency for it to stick or gall. This key feature of Gyrolok tube fittings allows you to repeatedly undo and redo the connection to perform any needed maintenance, resulting in less down time and the need for new materials.

Traditional tube vs gyrolok tube

Important design features of Gyrolok compression fittings vs. other compression fittings.

Controlled Ferrule Drive:

Helps prevent overstressing (by reducing O.D. cutting) of tubing or excessively reducing tubing inside diameter.

Front ferrule shoulder:

Front ferrule shoulder prevents body expansion and nut jamming, caused by over-tightening.

Butt Seal:

The Butt Seal provides a secondary seal and eliminates dead space where contaminants could be trapped.

1 ¼ Turns to Lock…Always:

All sizes, all materials, all pressure ratings are 1 ¼ turns to lock the fitting in place.

Guaranteed Interchangeability:

Gyrlok Tube Fittings have guaranteed interchangeability with other tube fittings.






GYROLOK FITTINGS – Gyrolok tube fittings

In the early 1960’s, HOKE took the industry by storm, introducing the GYROLOK® tube fitting. To this day, the design features offer unique advantages and benefits to users that are unmatched in the industry.

Key GYROLOK® Design Benefits:

  • Controlled Ferrule Drive and Sizing Angle:
    Avoids risks associated with over-tightening and allows for multiple remakes
  • Butt Seal:
    Provides an extra level of protection against leaks
  • Special high tolerance NPT thread specification:
    Ensures maximum thread engagement for a safer, more robust connection

Materials supported

316 SS, Monel, Inconel 625 and 825, Hastelloy C, Titanium, Duplex 2205, Super-Duplex 2507, 254SMO and Brass.
Available in both Metric and Imperial sizes.

Leave a Reply

Your email address will not be published. Required fields are marked *