SKU: 9608937436

Critical Orifice Kit --- K-150

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Description

Critical Orifice Kit --- K-150Meets or exceeds the following methods laws requirements: US EPA Method 5: Section 16. 2. 1. 1 (Selection of Critical Orifices) Section 16. 2. 2 (Critical Orifice Calibration) Product Description Critical Orifices are used to calibrate the dry gas meter (DGM) of various metering consoles. This calibration instrument is approved by the US EPA as calibration standard for calibrating a dry gas meter, in place of the wet test meter stated in Section 16. 1

Meets or exceeds the following methods/laws/requirements:

 

US EPA Method 5:

  • Section 16.2.1.1 (Selection of Critical Orifices)
  • Section 16.2.2 (Critical Orifice Calibration)


Product Description

Critical Orifices are used to calibrate the dry gas meter (DGM) of various metering consoles.

This calibration instrument is approved by the US EPA as calibration standard for calibrating a dry gas meter, in place of the wet test meter stated in Section 16.1 of the US EPA Method 5, provided that the critical orifices are selected, calibrated, and used in accordance with the instructions included in Section 16.2.1 of the US EPA Method 5.


This product connects to the following (non-exhaustive) list of products from Aer Sampling:

  1. Aer Sampling Metering Consoles (sample inlet)
Other Applicable Documents:
N.A.

 

Product Specifications

Connection: 1/2-inch quick connect

Material: Brass with Ruby orifice

Sizes (nominal):

Catalog ID

Size

Orifice diameter

Choked flow rate
inch mm cfm LPM
PN-738 400
 0.0400 1.0160 0.31 8.79
PN-739 480
 0.0480 1.2192 0.46 12.97
PN-740 550 0.0550 1.3970 0.60 17.08
PN-741 630 0.0630 1.6002 0.80 22.61
PN-742 730 0.0730 1.8542 1.09 30.94


Weight (Gravitational): 1.5 lbs / ~0.7 kg

Packing Dimensions (Length x Width x Height):
English (inch): 10.0 x 8.0 x 3.0
Metric (cm): 25.2 x 20.1 x 8.0


Other Information

Avoid vibration and/or shock.


Calibration of Critical Orifice 

These critical orifices do not come calibrated. For factory calibration before your first use, please add PN-773 --- Calibration of Critical Orifice into your cart before checking out (for online/website order) or please contact our Regional Sales Office (for offline order).

A calibration certificate will be issued:

  • The critical orifices are calibrated according to US EPA Method 5 (US CFR Title 40, Part 60, Appendix A, Test Method 5) Section 16.2.2, using a dry gas meter calibrated according to US EPA Method 5, Section 10.3, and other reference instruments with calibrations traceable to the International System of Units (SI).

Aer Sampling recommends calibrating critical orifices at least once a year.

Aer Sampling's critical orifices shall only be calibrated in vacuum mode (i.e., critical orifice be upstream of the vacuum pump). Results from calibration in non-vacuum modes (i.e., critical orifice is downstream of the pump; pump is pushing gas into the critical orifice) are not comparable. Critical orifice must reach critical conditions to be usable.


Manufacturing Warranty and Technical Support

 

All our products come with a one-year warranty against manufacturing defects and one-month technical support for free. Please refer to our Frequently Asked Questions (FAQs) page for more details.



-----

Information presented here is subjected to Aer Sampling Group's terms and conditions.
In case of discrepancy between English version and the non-English version, the English version shall prevail.
Doc ID: AERHQWW-k-150-en
Last revised (Excluding prices): 1; 08.22.22
Obsolete Catalog ID: PN-324, UC-OK

 

-----

Bill of Materials (BOM)

What does this product contain? (r2):

The following items are included. Click the Catalog ID below to view individual components of this product.

S/N Catalog ID Quantity Item Name
1 PN-738 1x
Critical Orifice Assembly, Size 400 [EACH]
2 PN-739 1x
Critical Orifice Assembly, Size 480 [EACH]
3 PN-740 1x
Critical Orifice Assembly, Size 550 [EACH]
4 PN-741 1x
Critical Orifice Assembly, Size 630 [EACH]
5 PN-742 1x
Critical Orifice Assembly, Size 730 [EACH]
6 PN-285 1x Box, Critical Orifice, Assembly [EACH]

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 9608937436

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4.2 ★★★★★
Based on 1556 reviews
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Product Reviews
M
Verified Purchase
MJ
Draper, US
★★★★★ 5
Nicest Bed Pillow Protectors I have found!
Size: Body
I have ordered these pillow protector cases multiple times for pillows that are extra thick or lofted as these seem to be very comfortable, durable, and really protect the pillow itself! They wash up well if there is any sort of stain. Nice bed pillows can be a real investment…it’s both easier to wash these protectors with my bed linens and more sanitary overall. Thin pillow protectors either wrinkle or fail to actually protect the pillow itself from whatever…dust mites, head lice, sweat, make up, skin care, spit up….be sure to follow the instructions for laundering and drying them and they will last a long time! My experience is these protectors keep my pillows from getting lumpy or bunching up, so promote a better night’s sleep!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
T
Verified Purchase
Tim
San Leandro, US
★★★★★ 5
This is definitely not your average pillow protector!
You have to see and feel this pillow protector to understand just how good it is (photos and videos just don't do it justice). It looks and feels like some sort of fancy premium luxury pillow case, but it's a zippered pillow protector! I always thought pillow protectors were just a simple white cotton zippered pillow case in order to add another layer in addition to the pillow case, but this pillow protector from COOP Home Goods completely blows me away. I just kept going, "Omg, are you kidding me? This is just a pillow protector?! Wow!" The only negative is, the zippered opening is too small. When I tried to put my brand new COOP pillow into it (I have the pillow that has approximately 15,000 reviews), it was very difficult. This was before I removed any of the filling for customization though, which I still needed to do. I finally got around to doing that and I probably removed about 1/3rd of the filling because I'm mostly a stomach sleeper, so I'm sure the pillow protector will be much easier to put on the next time I remove it, but I'm not going to remove it until I have to wash it because I don't want to be stuck trying to put it back on again! That's how annoying it was to put on. I'm keeping it though because I'm hoping it will mean I'll never have to wash the pillowcase or especially the pillow! That'd be awesome. I recently upgraded from a MyPillow Premium and I hated washing it (it was always a mini project, so I am hoping to be completely done with that). I contacted COOP about the small opening and they said, "We do have plans to change the zipper placement on our pillow protectors, however, production has not started and we do not have a firm date to provide you with at this time." They also reminded me that the pillow can be "bent and manipulated" (their words) into the pillow protector. See next paragraph though to understand why I didn't want to handle the pillow too much, otherwise I would've just done that instinctively. There is one more negative aspect that's worth mentioning, but it's due to a personal issue (there's nothing COOP can do about it). I have rough dry skin on my hands, and the material (40% Bamboo-derived Viscose Rayon, 60% Polyester) is rather 'catchy' on my hands. If you have rough dry skin and if you've ever tried to handle something made out of silk, you know what I'm talking about; you can't enjoy the silky smooth texture. This isn't anywhere near as bad as silk, but it's just bad enough that it's worth mentioning. I think it's due to the Bamboo-derived Viscose Rayon. The pillows are the same way for me due to the pillow case. That's probably what made the pillow case so difficult to put on because I was trying to be very careful not to get my skin flakes all over everything from just "manhandling" it, which is what I should've done and then just vacuumed it clean. heh I won't use lotion though because I don't like the idea of getting lotion on everything I touch every day, and it makes my hands sweat much easier - especially in the summer. So, I prefer to just deal with clean but rough dry hands. I guess another negative thing could be that it's not possible to just buy 1 pillow protector. These are 2-packs. I only needed 1 pillow protector and I only wanted 1. I would've gladly paid $15 for just 1. So anyway, beyond that, these pillow protectors truly have that "wow!" factor. They're exactly as advertised and more (because some things are only possible to know about by experiencing them for yourself).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2018
I
Verified Purchase
Ihave6kids
Natrona Heights, US
★★★★★ 5
Best pillow protector ive ever used!
Size: Body
I was afraid this pillow protector would inflate with air like every other pillow protector I've ever used (from super cheap to super not cheap). Man was I wrong! You can't even tell it's on the pillow and it doesn't take away from the squishy goodness of the pillow. I love these body pillow protectors so much I've ordered 5 so I'm never without! I also use their regular sized pillow protectors and it's the same exceptional quality. Coop home Good's outdid themselves with this one and I couldn't be happier. Body pillows are expensive and this is a good way for me to protect my investment without sacrificing any comfort! LOVE IT! UPDATE: I've been using these for a few months now and they're just as soft now as the day I put them on. But I have finally given in to the fact that they're a tad troublesome getting on and off. When I first got them I washed them often and line dried (these take a long time to dry, you have to flip them inside out over and over to get them fully dried because the inside will hold the water from the washing machine). However over time I've found myself washing them less frequently because it takes all day to get them dry but also because I'm always nervous the zipper will break during put ons and take offs. You are supposed to squish your pillow into and out of the opening which obviously is very possible but there's no way to avoid putting stress on the zipper opening during this process. Another thing about these protectors is that the greyish strip along the sides is NOT water proof. So everytime I do take the protectors off i find new stains along the sides where the pillow had no protection. And I could be wrong but I think the non-water proof gusseted sides are an essential to the extreme comfort of these protectors so I can't be too picky (otherwise I believe these would inflate with air anytime pressure is applied). If I didn't have young children I probably would've never even realized the sides aren't waterproof. I would still take the coop Home Good's pillow protector with non water proof gusseted sides over the average pillow protector ANY DAY.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2018
S
Verified Purchase
Stephenochi
Waukegan, US
★★★★★ 5
Good pillow protector
Size: Queen Size (Pack of 2)
Looks and feels very durable. Didn't notice and odor when opened or in use. Fits my Coop Home Goods pillow perfectly! Sleep quality is still good with these covers on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
M
Verified Purchase
MeMe🦋
Boise, US
★★★★★ 4
Very nice but expensive
Size: Queen Size (Pack of 2)
I love these cases, they didn't let out as much air as I had hoped for out the sides so I only zip it up half way so my pillow stays squishy and moldable and not partially filled with air which changes the feel of your pillow. Other then that they are great, they are very soft and quite, there is no noise whatsoever and there is some thickness to it adding a little more softness to your pillow. I ended up buying a second set. I just wish it had a little more airflow through the sides so I didn't have to leave it unzipped, that kind of defeats the purpose. I also think they are a little more expensive then they should be.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026

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