TIPS TO CONSIDER WHEN PURCHASING CLOSURES
When selecting Closures, pipeline operators should consider safety and performance factors. The TDW D2000 Closures with the ProSeries™ Advantage is the safest, most trusted closure on the market.
“Imitation is the sincerest form of flattery that mediocrity can pay to greatness.”
Don’t compromise safety and performance by settling for imitations. When it comes to closures, cutting corners isn’t an option. The safety of your crews, the integrity of your pipeline, and the efficiency of your operation all hinge on choosing the right product.
TDW’s D2000 ProSeries closures are backed by more than 100 years of engineering expertise, field experience, and continuous innovation.
When you invest in the D2000 ProSeries, you’re not just buying a closure—you’re choosing the best-in-class solution backed by a manufacturer who will be here for the lifetime of your pipeline.
the manufacturer
Proven track record – Does the manufacturer have decades of field-proven reliability, or are they new to the market? TDW closures have been rigorously tested and trusted by operators worldwide for generations.
Life cycle support – A closure is only as good as its support. Look at availability of parts, repair services, and consumables like O-rings and Pressure Warning Locks (PWLs). TDW ensures long-term support for every component.
See the D2000 Closure in action
SAFETY FIRST
The primary question: Does the design keep the operator out of the danger zone?
Operator positioning – With the D2000, operators can safely open the closure from outside the direct line of danger.
Pressure Warning Locks – Placement matters. PWLs located in the 12 o’clock position are less likely to collect debris than those on the door face. The D2000 design directs any retained pressure safely away from the operator.
Durability and spares – Unlike metal-to-metal seals that wear out quickly, TDW’s PWLs are supported with readily available O-rings and replacement parts, ensuring reliability and uptime.
Design AND FEATURES that matter
Simplicity of operation – Fewer moving parts mean fewer failure points and easier maintenance.
Ease of alignment – A single pivot point makes aligning the door with the collar straightforward and efficient.
Clamping surface design – Closures with parallel, non-wedging clamp-rings eliminate force transfer to holding components, reducing wear compared to tapered, wedging surfaces.
O-Ring LOCATION and performance
Sealing performance is critical, and O-ring placement makes a big difference.
Protected placement – O-rings positioned on the external outer edge of the collar are less likely to be damaged during pig loading or removal, and they’re better protected from debris.
Leak prevention – Properly compressed O-rings perform even at low pressure, reducing leak risks.
Material options – TDW offers multiple O-ring materials to suit varying operating conditions, giving operators flexibility and reliability.
TDW closures are there for the lifetime of your pipeline.
DOWNLOAD CLOSURE BROCHURE
At Kerr Engineered Sales Company, we know closures inside and out. For over 73 years, we’ve been helping operators make the right decisions for pipeline safety and efficiency. As TDW’s representative since 1952, we stand firmly behind their products and their commitment to excellence.
AGMSC APPALACHIAN GAS MEASUREMENT SHORT COURSE
Join the KERR team at 2025 AGMSC Appalachian Gas Measurement Short Course August 4-7, 2025 at Robert Morris University in Pittsburgh, PA.
Join the KERR team August 4-7, 2025 at the AGMSC.
The Appalachian Gas Measurement Short Course is the most highly regarded educational forum in the Natural Gas Industry. Since 1976, it has been hosted by Robert Morris University in Pittsburgh, PA. The KERR team will be exhibiting.
The 2025 schedule can be found here.
David Kerr, President of Kerr Engineered Sales, will be giving a hands- on workshop about Catalytic Heater Operations, Troubleshooting and Maintenance on Tuesday, August 5th. Bruest Catalytic Heaters are the world leader in flameless, gas infrared Catalytic Heaters.
Consolidated Analytical Systems (CAS) infrastructure will be on display outside the venue. Seth Cloran and Mathieu Touzin from CAS will be running a course on Online Measurement of Odorant and Natural Sulphurs Wednesday August 6, 8:30 am.
ZEVAC and other principals that KERR represents will be present at the exhibits and events.
Kerr Engineered Sales Company has been representing leading pipeline repair and performance companies in Eastern US since the company was founded in 1952. Seventy three years later, the company remains a family business serving customers with the highest quality service and expertise.
Our application specialists at Kerr Engineered Sales Company are also available for team presentations, lunch and learns and customer visits.
DANIEL - LEADER IN FLOW MEASUREMENT SOLUTIONS
Pittsburgh, PA - Kerr Engineered Sales Company announces new partnership with Daniel Measurement & Control, the leading provider of flow measurement control solutions with a long-standing reputation for precision and reliability.
April, 2025 - Pittsburgh, PA
Kerr Engineered Sales Company announces new partnership with Daniel Measurement & Control, the leading provider of flow measurement control solutions with a long-standing reputation for precision and reliability. Daniel is the only manufacturer that has the knowledge and expertise to engineer and offer superior products that are trusted to provide the most reliable and accurate measurements in the global oil and gas industry.
Based in Houston, TX, for over 90 years, Daniel has maintained a commitment to innovation and quality throughout the industry.
new — CORIOLIS MASS FLOW METER
Coriolis Mass Flow Meter
MASS FLOW METER ONE PAGER
The Coriolis Mass Flow Meter is the next-generation advanced mass metering technology engineered to deliver highly accurate and reliable mass, density, and volumetric flow measurements.
ORIFICE FITTINGS
Senior Dual-Chamber Orifice Fittings
DUAL-CHAMBER BROCHURE
Simplex Single-Chamber Orifice Fitting
SINGLE-CHAMBER BROCHURE
Orifice Flange Unions
ORIFICE FLANGE UNION BROCHURE
““We are proud to partner with Daniel Measurement & Control. The high quality Orifice Meters and the new Mass Flow Coriolis Meters are an ideal fit for our customers.””
Since 1952, Kerr Engineered Sales Company has been a trusted partner in the Eastern U.S., representing leading companies in pipeline repair and performance. A family-owned business for over seven decades, Kerr continues to deliver exceptional service and expertise dedicated to improving the life of pipelines.
Our Application Specialists at Kerr are available for team presentations, lunch and learns and site visits. We are here to help you optimize your gas utility operations and ensure the safety and efficiency of your equipment.
TDW FIRSTS: ISOLATION TOOLS & FITTINGS IN ACTION
To help a customer isolate a section of a gas pipeline being upgraded and replaced, TDW employed three new applications of its technology, along with the first use of ZEVAC® cross-compression equipment.
To help a customer isolate a section of a gas pipeline being upgraded and replaced, TDW employed three new applications of its technology, along with the first use of ZEVAC® cross-compression equipment.
Isolating the Lines
TDW ProStopp® DS Isolation Tool
An East Coast gas company needed to replace a section of bare steel pipe as part of their infrastructure upgrade program. They were also installing a new gas regulator station on the same project. The 3,200 foot section of 16” and 10” pipeline, needed to be replaced without shutting off service to any customers.
TDW recommended the use of Spherical 3-WAY Tees at both locations. With Stops set thru the Spherical Tees, the line could be isolated while gas was still allowed to travel thru the system thru the new permanent bypass that was welded between the outlet of the two spherical tees.
To isolate the section of pipe, TDW technicians deployed a 16” STOPPLE® Train, a patented system designed to isolate sections of pipeline for maintenance or repairs while the line remains in service. The STOPPLE® Train Isolation Machine uses double block and bleed technology, featuring two Sealing Cups with a bleed port between to ensure secure isolation.
For isolating the 10-inch line, TDW deployed the 10-inch ProStopp® DS Isolation Tool, which also uses double block and bleed technology with two hydraulically activated plugging heads.
Redirecting Gas Instead of Venting
Once the isolations were set on the 16-inch and 10-inch lines, the trapped gas between the isolated sections needed to be removed so that the line could be cut and capped. Rather than venting the gas into the atmosphere the traditional method, TDW technicians utilized a ZEVAC® (Zero Emission Vacuum and Compressor) Quad to extract the gas from the isolated section and redirect it back into the existing 16-inch line.
Gas utilities implement cross-compression technology like ZEVAC for methane emissions reduction during live gas operations.
ZEVAC® extracts gas from the isolated section and redirects it into the 16-inch line.
After depressurizing the line, the team secured the area overnight. Upon returning, they verified that the isolation seals were intact, providing a 100% shut-off. With no gas remaining, the utility safely cut out the old section and welded end caps. This permanently rerouted gas thru the spherical tees and into the new section of pipe.
Conditioning the Line
TDW TOR 3-WAY Tee Bypass
Another TDW first on this project, TDW’s new 2-inch THREAD-O-RING™ (TOR) 3-WAY™ Tee was used to build a bypass line between the new and old pipelines. The utility did this two weeks before the isolation, when they were conditioning (pickling) the line. Once the STOPPLE and the ProStopp were set, the TOR 3-WAY Tee Bypass was employed as the suction and discharge point for the ZEVAC® machine during line conditioning.
When the bypass was no longer needed, the TOR 3-Way™ Tee was isolated using TDW’s new Temporary Isolation Plug (TIP). Used for the first time on site, the TIP allowed the utility to safely decommission the outlet on the TOR 3-Way Tee. After both lines were capped off, the TOR Plugs were set in the TOR fittings, enabling the utility to complete the fittings.
Results
This complex isolation project was completed on schedule, allowing the utility to safely install the sections of pipeline without shutting off service to any customers. The new TDW technologies utilized in this project included:
TDW 10-inch ProStopp® DS Isolation Tool
TDW 2-inch THREAD-O-RING™ (TOR) 3-WAY™ Tee
TDW Temporary Isolation Plug (TIP)
Additionally, TDW technicians effectively operated a ZEVAC® Quad cross-compression unit to redirect about 25,000 scf of gas back into the 16-inch line, effectively reducing the utility’s methane emissions. The collaboration between TDW’s isolation tools and ZEVAC® marked a successful first use of these combined technologies.
Our application specialists at Kerr Engineered Sales Company are available for demonstrations, team presentations, lunch and learns and site visits. We are here to help you optimize your gas utility operations and ensure the safety and efficiency of your equipment.
Kerr Engineered Sales Company has been representing leading pipeline repair and performance companies in Eastern US since the company was founded in 1952. Seventy three years later, KERR remains a family business delivering the highest quality service and expertise.