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Model RT4000

Coupon Insertion System
Retractable with Packing Gland

View data sheet (PDF)

Model RT4000 coupon insertion system is a retractable unit commonly used in field and plant applications. A specially designed packing gland is used to insert or retract a coupon from a pressurized system without a process shutdown. The insertion system is designed to mount onto a 1" piping system, but can easily be adapted to fit your specific requirements. The system consists of an insertion rod with a coupon adapter, and a packing gland. A safety chain and safety nut are also provided to prevent blowout. Standard packing material in the packing gland is Teflon®, however, Grafoil® packing can be provided for high temperature applications. Several coupon holders and lengths are available. *The insertion length (I.L.) shown here is based on a standard Metal Samples Corrosion Monitoring Systems part #CO118 coupon and may vary for other coupons depending on the coupon length and hole location.


Probe Body - 316 Stainless Steel
Temperature Rating - 500° F / 260° C Teflon®
Temperature Rating - 850° F / 454° C Grafoil®
Pressure Rating - 2000 PSI / 138 Bar
Mounting - 1" Full Port Valve (min.)

Std. Length I.L. (Max)
24" 18.54"
30" 24.54"
36" 30.54"
42" 36.54"

The Easy Tool is required for probe insertion or retraction in systems with pressure over 150 pounds.

Related Documents

 Easy Tool
 Safety Chain Instructions
 Packing Gland Instructions
 Length Calculation for Retractable Probes
 Canadian Registration Numbers (CRNs)

RT4000 Ordering Information

RT45 - Retractable Coupon Insertion System 1" Female NPT, Packing Gland with Teflon®
RT75 - Retractable Coupon Insertion System 1" Female NPT, Packing Gland with Grafoil®
RT00 - Retractable Coupon Insertion System Replacement Insertion Rod
  Insertion Rod & Mounting Material
20 - 316 (when ordering only Insertion Rod - RT00)
22 - 316
40 - C276 (when ordering only Insertion Rod - RT00)
44 - C276
  Coupon Options
010 - Fits P/N CO100
030 - Fits P/N CO118
040 - Fits P/N ES200 (Cylindrical Coupons)
050 - Fits P/N CO111
060 - Fits P/N CO220
24 - 18.54 inches max. insertion length
30 - 24.54 inches max. insertion length
36 - 30.54 inches max. insertion length
42 - 36.54 inches max. insertion length
Coupon Adapter and Insulators
1 - Coupon adapter same material as rod, Teflon® insulators
2 - Teflon® coupon adapter, Teflon® insulators
3 - Coupon adapter same material as rod, ceramic insulators
4 - Coupon adapter same material as rod, nylon insulators
5 - Nylon coupon adapter, nylon insulators
6 - Coupon adapter same material as rod, no insulators
    Rod Length (Multi Disc CO220 Coupons Only)
Enter length in inches, stated in 2 decimal place format.
Round calculated length down to the nearest 1/8".
(Example: 5 1/8" = 0512)
Your Part Number



This list represents our most common options.  Many other sizes, alloys, and options are available.
Please contact your Metal Samples sales representative if you do not see what you're looking for.

Teflon® is a registered trademark of DuPont.
Grafoil® is a registered trademark of NeoGraf Solutions.


Metal Samples Company

P.O. Box 8
152 Metal Samples Rd.
Munford, AL 36268

: (256) 358-4202
Fax: (256) 358-4515

E-mail: msc@alspi.com

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Metal Samples Company is a division of Alabama Specialty Products, Inc. - Copyright © 2024