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Nozzles for Isokinetic Sampling
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Nozzles for Isokinetic Sampling
Apex Instruments offers button-hook nozzles from a variety of different materials and sizes since a range of nozzle sizes is required for isokinetic sampling. The size is dependent upon the stack gas velocity and the material is dependent upon the stack temperature and the sampling method. The most popular nozzles are constructed from seamless 316 stainless steel and can optionally be coated with PTFE. Other nozzle materials include borosilicate glass, inconel alloy 600 and quartz. Standard sampling nozzles are 4 inches long and have a 5/8 inch OD shank for attaching to the probe union. Alternatively, glass and quartz nozzles are available with female 14/35 taper joint eliminating the need for the 5/8 inch union and used with mating probe liners with the male taper. Other sizes and configurations are available. Please note nozzles must be calibrated before initial use.
| Recommended
Maximum Temperatures |
| Material |
Maximum Temperature |
| Stainless Steel |
650°C (1200°F) |
| PTFE Fittings |
177°C (350°F) |
| Borosilicate Glass |
480°C (900°F) |
| Inconel |
980°C (1800°F) |
| Quartz |
900°C (1650°F) |
| Viton® O-rings |
260°C (500°C) |
| Graphite Ferrules |
980°C (1800°F) |
| Glass Filled PTFE |
315°C (600°F) |
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Isokinetic Nozzle Sets
Nozzle Sets include a selection of the most commonly used sizes.
Packaged in a foam-lined carrying case for protection. Each set contains 7 nozzles, sizes 4, 6, 8, 10, 12, 14 and 16.
| Part # |
Description |
| NS-SET |
Set of 7 Stainless Steel
Nozzles, includes four 5/8” Tube Nuts and Preswagged
Ferrules |
| NG-SET |
Set of 7 Glass Nozzles,
includes Case, three 5/8” Glass Filled PTFE Ferrules
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| NG-SET-T |
Set of 7 Glass Nozzles,
includes Case, three 5/8” Glass Filled PTFE Ferrules with Taper
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| NI-SET |
Set of 7 Inconel Nozzles,
includes Case, Preswagged Stainless Steel Ferrules |
| NQ-SET |
Set of 7 Quartz
Nozzles, includes Case (Order Ferrules Separately) |
| NQ-SET-T |
Set of 7 Quartz
Nozzles, includes Case (Order Ferrules Separately) Taper Included |
The case (SH-NZ) can be ordered separately. Custom
sets available.
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Threaded Nozzle Set
Apex Instruments Threaded Nozzle Set (NS-TH-SET)
feature the larger ID nozzles for low stack gas velocity
and a buttonhook Nozzle Blank (NS-THB) with a tapered fitting. The Set includes seven SS Nozzle Tips that thread onto the Nozzle Blank. Sizes include 5/8",21/32", 3/4",13/16", 7/8", 15/16" and 1".
| Part # |
Description |
| NS-TH-SET |
Set of 7 SS Nozzles - Sizes 20, 22,
24, 26, 28, 30 & 32,
One NS-THB Nozzle Blank and includes
case and 5/8 inch tube nut
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Nozzle Accessories
Click on image to view or download.
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| Ferrules |
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| Part# |
Description |
| 10F-S |
5/8 inch Single Ferrule, Stainless Steel |
| 10F-GR-DZ |
5/8 inch Graphite Single Ferrule, High Temperature,
Dozen |
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| NI-10FF |
5/8 inch Inconel Front Ferrule |
| NI-10BF |
5/8 inch Inconel Back Ferrule |
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| NT-10F |
5/8 inch TFE Single Ferrule |
| NTG-10F |
5/8 inch Glass Filled Single Ferrule |
| NTG-10F-DZ |
5/8 inch Glass Filled Single Ferrule, Dozen |
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| Tube Nut |
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| Part# |
Description |
| N-10 |
5/8 inch Stainless Steel Tube Nut |
| NI-10N |
5/8 inch Inconel Tube Nut |
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| Seals |
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| Part# |
Description |
| O-113V |
5/8 inch Viton® O-rings to seal Liner or
Nozzle (Use with N-10BR) |
| O-113V-DZ |
5/8 inch Viton® O-rings to seal Liner or
Nozzle, 12/pack |
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| N-10BR |
5/8 inch Thrust Backer Ring for 5/8” O-ring
Seal, Stainless Steel |
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| Stoppers |
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| Part# |
Description |
| GS-13 |
Rubber Sleeve Stopper, Size 13mm, 10/pk |
| GS-20 |
Rubber Sleeve Stopper, Size 20mm, 10/pk |
| GS-30 |
Rubber Sleeve Stopper, Size 30mm, 10/pk |
| GS-MIX |
Rubber Sleeve Stopper Kit, 10 each size (13mm, 20mm, 30mm) |
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| Unions |
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| Part# |
Description |
| N-10U |
5/8 inch Stainless Steel
Union with Nuts and Ferrules |
| N-10UB |
5/8 inch Stainless Steel Union, Bored Out, with
Nuts and Ferrules |
| N-10US |
5/8 inch Stainless Steel Union, Bored Straight
Through, with Nuts and Ferrules |
| N-10UBT |
5/8 inch Stainless Steel Union, Bored Out, PTFE
Coated, No Nuts or Ferrules |
| N-10UST |
5/8 inch Stainless Steel Union, Bored Straight
Through, PTFE Coated, No Nuts or Ferrules |
| NI-10U |
5/8 inch Inconel Tube Union with Nuts and Ferrules |
| NI-10UB |
5/8 inch Inconel Tube Union, Bored
Out, with Nuts and Ferrules |
| NI-10US |
5/8 inch Inconel Tube Union, Bored Straight
Through, with Nuts and Ferrules |
| NT-10U |
5/8 inch TFE Tube Union with Nuts and Ferrules |
| NTG-10UNN |
5/8 inch Glass Filled PTFE Union Body, No
Nuts or Ferrules |
| NTG-10V |
5/8 inch Glass Filled PTFE Union Body with
Nuts or Ferrules |
Click here for our complete line of Nozzle
Brushes.
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