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.
CLOSING TDW D2000 CLOSURES
The D2000 quick-actuating closure combines operator safety with ease of operation. After depressurization, closing operations are performed in a fast, single motion. Here’s a quick guide to closing procedures.
TDW PIGGING INSIGHTS - Episode 6
A quick guide to closing and maintaining the D2000 Closure.
D2000 Quick-Actuating Closure
The D2000 quick-actuating closure combines operator safety with ease of operation. After depressurization, opening and closing operations are performed in a fast, single motion, with the operator standing safely to the side. The D2000 closure maximizes efficiency and reduces both, personal operator risk and company operational cost.
CLOSING PROCEDURES
Before closing, inspect, clean, and lubricate the O-Ring on the barrel collar, including the O Ring grooves and sealing surfaces
Push the door firmly shut with no gap between the door face and hub face.
Pull down on the clamp ring handle to close the door.
Install the pressure warning lock screw, make sure it is not cross threaded.
Hand tighten the pressure warning lock screw and then add about one eighth of a turn with a wrench. Do not over tighten.
MAINTENANCE TIPS TO BE DONE REGULARLY
Lubricate all the pivot point on top of the clamp ring assembly, front and back, as well as door hinge, top and bottom
Keep all the exterior surfaces painted to prevent rust
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If you have questions, please contact the Kerr Engineered Sales Company who are also available for team presentations, lunch and learns and customer visits.
OPENING TDW D2000 CLOSURES
The D2000 quick-actuating closure combines operator safety with ease of operation. After depressurization, opening and closing operations are performed in a fast, single motion. Here’s a quick guide to opening the closure.
TDW PIGGING INSIGHTS - Episode 5
A quick guide to opening and maintaining the D2000 Closure.
D2000 Quick-Actuating Closure
The D2000 quick-actuating closure combines operator safety with ease of operation. After depressurization, opening and closing operations are performed in a fast, single motion, with the operator standing safely to the side. The D2000 closure maximizes efficiency and reduces both, personal operator risk and company operational cost.
OPENING
To safely open the TDW D2000 clamp ring closure door, follow these procedures:
Isolate the vessel from line pressure, bleed the pressure to 0 psig and drain.
Always stand on the side of the closure that is opposite the door hinge.
Open the pressure warning lock by turning the screw counterclockwise. If there is still gas in the line, tighten pressure warning lock and continue to bleed pressure until 0 psig, then continue procedure again.
Inspect the pressure warning lock, O-Ring and the bushing.
Lift the clamp ring handle and put the pressure warning lock in the hole furthest to the right.
Clean and lubricate the interior surface of the clamp ring.
MAINTENANCE TIPS TO BE DONE REGULARLY
Lubricate all the pivot point on top of the clamp ring assembly, front and back, as well as door hinge, top and bottom
Keep all the exterior surfaces painted to prevent rust
Check out our Pig Resource page.
If you have questions, please contact the Kerr Engineered Sales Company who are also available for team presentations, lunch and learns and customer visits.
TROUBLESHOOTING PIG-SIG V
PIG-SIGs detect pigs, spheres, scrapers, and other tools as they pass distinct points along the pipeline. They can also alert operators if a pig is lost or stuck. This blog has tips and solutions to the most common issues with the TDW Pig Sig V.
Tips, solutions and operating guide for issues with TDW Pig-Sig V.
Pig passage indicators are commonly referred to as “PIG-SIGs,” a term TDW originated more than 60 years ago. They accurately detect pigs, spheres, scrapers, and other tools as they pass distinct points along the pipeline and when they reach the receiver, and can also alert operators if a pig is lost or stuck.
The weatherproof and corrosion-resistant PIG-SIG® V pig passage indicator is built to withstand most environments. All components exposed to pipeline products are completely sealed to prevent leaks.
DOWNLOAD PIG SIG V OPERATIONS GUIDE
NOTE: It is very important to read these troubleshooting guidelines in conjunction with the Pig Sig V Operating and Maintenance instructions PIG- SIG V Guide
ISSUE: The Plug assembly won’t thread on to the THREAD-O-RING ™ Nipple
Verify that it is indeed a TDW THREAD-O-RING. The hole in the pipe may be too small or not centered. The TDW THREAD-O-RING may be swedged due to over-tightening of a valve or cap. Measure the inside dimension (ID) to ensure it is not swedged or egged.
ISSUE: PIG-SIG V has never worked correctly
Verify that the proper TDW THREAD-O-RING was used to correspond with the wall thickness of the pipe. Measure the height of the THREAD-O-RING as it is mounted to the pipe and then add that measurement to the wall thickness of the pipe. The measurement should not exceed 4.50 inches but needs to be greater than 4.25 inches.
ISSUE: The Plug stopped working correctly
If the plug is contaminated, install a new filter pack version. If there is wax build up in the plug: consult with the TDW factory regarding other plug options.
If The Trigger is damaged, the first step is to verify that the proper TDW THREAD-O-RING was used for corresponding wall thickness of pipe. Measure the height of the TDW THREADO-RING as it is mounted to the pipe and then add that measurement to the wall thickness of the pipe. This measurement should not exceed 4.50 inches but needs to be greater than 4.25 inches.
The plug may have wax or other buildup that is preventing the trigger from moving. This can lead to the plug being damaged.
ISSUE Electrical or Combo Electrical switch is not sending electrical signal
Check for the proper switch adjustment. Please refer to electrical switch instruction in the manual and ensure that the switch is adjusted properly.
Ensure that the double torsion spring is still installed correctly.
Verify that the indicator is properly installed. Check the indicator installation by removing a set screw and looking for the groove on the plug.
Verify that the plug is fully installed. Measure the distance the plug extends above the THREAD-O-RING Nipple; the distance should be 1 3/8 inches.
In the event of freezing weather, the seal on the indicator may have been compromised allowing water to enter the upper position of the plug. This water can freeze and not allow the magnet to move.
ISSUE: Indicator - The All Types Flag doesn’t raise after assumed pig passage
Verify that the indicator is properly installed: check indicator installation by removing a set screw and looking for the groove on the plug.
Verify that the plug is fully installed: Measure the distance the plug extends above the THREAD-O-RING nipple (should be 1-3/8 inches).
In the event of freezing weather: the seal on the indicator may have been compromised allowing water to enter the upper portion of the plug. This water can freeze and not allow the magnet to move. Remove indicator and check for moisture.
IN THE EVENT OF FREEZING WEATHER:
Remove indicator to check for moisture. 65 Section VII – Maintenance Table 11. PIG-SIG V Maintenance Intervals Item Interval Seal Inspect every six months for tears or cracks.
Replace annually (order seal kit).
Magnet Inspect annually.
Replace if cracks or chips are present.
Indicator O-ring is recommended to be replaced annually.
Plug O-ring Inspect any time the plug is removed. Replace annually.
Plug Backup Ring should be replaced each time the plug is removed.
NOTE: Times may vary depending on the pipeline product and the environment that the unit is exposed to.
ISSUE:Flag does not raise after assumed pig passage/switch does not actuate or release (reset)
Proper switch adjustment: refer to electrical switch instruction in the manual and ensure the switch is adjusted properly. The gap between polymer slider and switch plunger should be between 0.005 and 0.02 inches (0.1 to 0.6mm).
To discuss issues with your Pig Sig V please contact any of the KERR team.
Kerr Engineered Sales Company has been representing leading pipeline repair and performance companies in Eastern US since the company was founded in 1952. Seventy years later, the company is still a family run business serving customers with the highest quality service and support.