Case Studies
6500 Ton Hydraulic Press with R11K SEAL Rod Seals – Hydraulic Sealing
Intro
Case study APAC0023 – Chesterton products – Chesterton EPS
In Korea, a metal stamping manufacturer reported ram leakage and a short seal life in the 6,500-ton master cylinder and return cylinders. Looking to increase the mean time between repair (MTBR), they came to Chesterton to find a fitting solutions. Chesterton specialist recommended the unique Chesterton® 11K split seal with its dual material combination and spacer, made from our patented materials, AWC800/AWC805.
Products featured in the case study:
Chesterton 11K
Challenge
In Korea, a metal stamping manufacturer reported ram leakage and a short seal life in the 6,500-ton master cylinder and return cylinders. The original stacked v-ring set (8 rings/set) previously used only lasted six months. The client wanted to increase MTBR from 6 months to 12 months. The delivery time for the current seal was three months, and the customer also wanted to reduce the lead time.
Image of actual 6500 ton press (before replacement)
Image of actual 6500 ton press (after replacement)
Solution
Chesterton specialist recommended the unique Chesterton® 11K split seal with dual material combination and spacer (dual component, split stacked set for hydraulic sealing).
The Chesterton® patented 11K EZ Stack Pack is a single acting, two-piece split stacked set that employs a negative rake lip profile to optimize operating performance while easing installation into the stuffing box cavity. The unique, split design, made up of two components, eliminates the need for equipment disassembly and shimming and is recommended for use in hydraulic cylinders and presses.
Size: Main 950×1,000×91.8mm(Seal H) Return 750x800x50mm(Seal H)
Material: AWC 800/AWC805/AWC800
Chesterton® 11K
Chesterton® 11K cross-section
Results
The customer reported that seal performance improved MTBR from 6 to 18 months. The positive customer feedback is linked to the improvement of the seals’ life, the reduction of overhaul times and costs and the shorter delivery times.
| ROI | OEM Seal | Chesterton® |
| Product Price (A) | $9 200 | $4 900 |
| Replacement Cycle | 6 months | 18 months |
| Labor cost for Replacement (B) | $640/once x 3 times = $1920 | $430 x 1 time = $430 |
| Production Loss (C) | $352 800 | $78 400 |
| Total Cost (18 months) (A) + (B) + (C) | $363 920 | $83 730 |
TOTAL SAVINGS using Chesterton® 11K: $280 190
About Us
Chesterton® is a world leader in helping process industry companies and manufacturers improve the reliability and efficiency of their rotating, stationary, and fluid power equipment platforms. We are known across a wide range of industries for our award-winning pump and valve sealing solutions, applications expertise, equipment maintenance and wear-prevention products, and knowledgeable hands-on local service.
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Case Study APAC0023 – Issued 02/21