Suppliers of drinking water systems know that access to markets throughout the world requires that their products be certified to NSF/ANSI Standard 61 (“NSF 61”). NSF 61 sets limits for the amount of chemicals permitted to leach into drinking water from the materials used in water transmission and distribution. With years of experience in providing seals that meet NSF 61, Datwyler’s Parco brand offers O-rings and custom molded seals in both sulfur-cured and peroxide-cured compounds, specially formulated to resist chloramines. You’ll find a list of the best NSF listed compounds for your application, and an easy link to get in touch with us to discuss your requirements further.
Datwyler is committed to being the leading supplier of EPDM O-rings for NSF/ANSI Standard 61 (NSF 61). That standard sets limits for the amount of chemicals permitted to seep into drinking water. Datwyler’s low-cost, general-purpose, peroxide-cured 5323-70 EPDM compound is certified to NSF 61. Compound 5323-70 meets the Federal Drug Administration (FDA) standard requirements for food-handling applications. We’ve doubled our inventory, cut our prices 15 percent, and reduced or minimum order to about $5. So when you need peroxide-cured EPDM O-rings that meet NSF 61, you no longer have to check more than one source for available inventory and competitive prices. Make Datwyler your first choice for NSF 61 O-rings.
5323-70 Meets Your Needs
1. Outstanding Resistance to Compression Set
Datwyler seals made from peroxide-cured 5323-70 have excellent resistance to compression set. After testing 5323-70 for 22 hours at 257°F, it had a compression set of only 13 percent. At 13 percent, 5323-70 significantly outperforms similar sulfur cured EPDM compounds. 5323-70’s excellent compression set allows it to better maintain its elastomeric properties and original thickness, preserving seal integrity.
2. Excellent Resistance to Chloraminated Water
Datwyler’s peroxide-cured 5323-70 compound has superior resistance to volume swell in chloraminated water applications. After testing for 70 hours at 212°F in chloraminated water, 5323-70 seals experienced volume swell of one percent. That low volume swell makes seals made from peroxide-cured 5323-70 substantially better than similar sulfur-cured compounds. Datwyler recommends its 5323-70 compound for chloraminated or chlorinated applications such as faucets, hose bibs, and other residential plumbing fixtures.
3. Exceptional Prices and Inventory
Datwyler’s 5323-70 prices are the lowest in the industry. We work with the best suppliers, buy in large volumes, and sell in standard quantity bags. Those features allow us to provide you with 5323-70 O-rings at great prices. Additionally, we carry over 10 million pieces of 5323-70. And we stock all 369 standard sizes. If we receive your order before 2:30 p.m. Pacific time, you can receive your parts as soon as the next day.
Key Features
Datwyler’s 5323-70 EPDM seals are ideal for use in chloraminated water applications. Key features include:
NSF 61 Listed:
Datwyler 5323-70 seals are approved for materials used in drinking water service (listed for maximum exposure of seal material 1.3in2/liter of commercial hot water at 180°F; listing includes domestic hot and cold water).
FDA Conforming:
Datwyler 5323-70 seals conform to FCDA standard 177.2600, which provides approval for repeated use in food handling equipment.
Outstanding resistance to compression set:
Datwyler 5323-70 peroxide-cured seals had a compression set of only 13 percent after 22 hours at 257°F.
Excellent resistance to chloraminated water:
Datwyler 5323-70 seals had a volume swell of 1 percent after 70 hours at 212°F in chlorminated water.
Wide range of service temperatures:
Datwyler 5323-70 seals are suitable for applications ranging from -50 to +250°F.
Chemical Resistance
USE WITH
DO NOT USE WITH
Acetone
Automotive Brake Fluid
Skydrol
Steam
Water
Automatic Transmission Fluid
Gasoline
Military Aircraft Hydraulic Fluid
Compression Set, Solid
22 hours at 150°C (302°F)
pct. of original deflection, max.
40
17
D395
Method B
EA14
Fluid Aging, Water
70 hours at 100°C (212°F)
Volume change, pct.
±5
2
D471
F19
Low Temperature Property
Nonbrittle after 3 min. at -55°C
Pass
Pass
D2137
CONCLUSION: Datwyler import ethylene-propylene-diene compound 5323-70 meets the requirements of ASTM D2000 M2DA710 A26 B36 EA14 F19 Z1.
ASTM is the acronym for the American Society for Testing and Materials.
Source: Test Report 2577.
5323-70 EPDM Seals
Need 70-Durometer NSF 61 EPDM O-rings Tomorrow?
Datwyler is committed to being the leading supplier of EPDM O-rings for NSF/ANSI Standard 61 (NSF 61). That standard sets limits for the amount of chemicals permitted to seep into drinking water. Datwyler’s low-cost, general-purpose, peroxide-cured 5323-70 EPDM compound is certified to NSF 61. Compound 5323-70 meets the Federal Drug Administration (FDA) standard requirements for food-handling applications. We’ve doubled our inventory, cut our prices 15 percent, and reduced or minimum order to about $5. So when you need peroxide-cured EPDM O-rings that meet NSF 61, you no longer have to check more than one source for available inventory and competitive prices. Make Datwyler your first choice for NSF 61 O-rings.
5323-70 Meets Your Needs
1. Outstanding Resistance to Compression Set
Datwyler seals made from peroxide-cured 5323-70 have excellent resistance to compression set. After testing 5323-70 for 22 hours at 257°F, it had a compression set of only 13 percent. At 13 percent, 5323-70 significantly outperforms similar sulfur cured EPDM compounds. 5323-70’s excellent compression set allows it to better maintain its elastomeric properties and original thickness, preserving seal integrity.
2. Excellent Resistance to Chloraminated Water
Datwyler’s peroxide-cured 5323-70 compound has superior resistance to volume swell in chloraminated water applications. After testing for 70 hours at 212°F in chloraminated water, 5323-70 seals experienced volume swell of one percent. That low volume swell makes seals made from peroxide-cured 5323-70 substantially better than similar sulfur-cured compounds. Datwyler recommends its 5323-70 compound for chloraminated or chlorinated applications such as faucets, hose bibs, and other residential plumbing fixtures.
3. Exceptional Prices and Inventory
Datwyler’s 5323-70 prices are the lowest in the industry. We work with the best suppliers, buy in large volumes, and sell in standard quantity bags. Those features allow us to provide you with 5323-70 O-rings at great prices. Additionally, we carry over 10 million pieces of 5323-70. And we stock all 369 standard sizes. If we receive your order before 2:30 p.m. Pacific time, you can receive your parts as soon as the next day.
Key Features
Datwyler’s 5323-70 EPDM seals are ideal for use in chloraminated water applications. Key features include:
NSF 61 Listed:
Datwyler 5323-70 seals are approved for materials used in drinking water service (listed for maximum exposure of seal material 1.3in2/liter of commercial hot water at 180°F; listing includes domestic hot and cold water).
FDA Conforming:
Datwyler 5323-70 seals conform to FCDA standard 177.2600, which provides approval for repeated use in food handling equipment.
Outstanding resistance to compression set:
Datwyler 5323-70 peroxide-cured seals had a compression set of only 13 percent after 22 hours at 257°F.
Excellent resistance to chloraminated water:
Datwyler 5323-70 seals had a volume swell of 1 percent after 70 hours at 212°F in chlorminated water.
Wide range of service temperatures:
Datwyler 5323-70 seals are suitable for applications ranging from -50 to +250°F.
Chemical Resistance
USE WITH
DO NOT USE WITH
Acetone
Automotive Brake Fluid
Skydrol
Steam
Water
Automatic Transmission Fluid
Gasoline
Military Aircraft Hydraulic Fluid
Full Line of NSF-61 Seals for Drinking Water Systems
Datwyler seals made from its internally lubricated, peroxide-cured, ethylene-propylene (EPDM) compounds are tailored to the unique needs of water filtration equipment. Datwyler’s 5778 compounds are available in four hardnesses from 50 to 90 Shore A durometer and are certified to NSF/ANSI Standard 61 (“NSF-61”). The enhanced properties of Datwyler’s 5778 compounds make them ideal for chlorinated or chloraminated water applications. Datwyler recommends its 5778 compounds for faucets, hose bibs, and other residential plumbing fixtures.
5778 Meets Your Needs
1. Excellent Resistance to Chloraminated Water
In most fluids, elastomers reach a plateau in volume swell after several days of exposure. By contrast, chloraminated water has long-term effects on many commonly used seal materials, causing them to continue swelling even after weeks of immersion. In some cases, there appears to be no limit to the degree of swelling that can occur. Datwyler’s 5778 seals are peroxide-cured, giving them high chemical stability. 5778 seals contain no sulfur, so they are compatible with materials commonly used in plumbing fixtures. The seals experience long-term volume swell of only one percent, making them suitable in chloraminated or chlorinated water.
2. Enhanced Resistance to Compression Set
When installed, seals must resist taking a set from compression. When a seal takes a set, it no longer exerts force on the mating surfaces, resulting in leakage. A compound with low compression set, like our 5778 EPDM compounds, better maintain their elastomeric properties and original thickness, preserving seal integrity. Seals made from Datwyler’s 5778 compounds provide excellent resistance to compression set at higher temperatures. After testing for 22 hours at 212°F, 5778-70 seals had a compression set of only 11 percent.
Key Features
Datwyler’s 5778 EPDM compounds are designed for chloraminated water applications. Key features include the following:
Certified to NSF/ANSI Standard 61:
Datwyler 5778 seals are approved for materials used in drinking water service (listed for maximum exposure of seal material 1.3 in2/liter of commercial hot water at 180°F; listing includes domestic hot and cold water).
Excellent resistance to chloraminated water:
Datwyler 5778 seals had volume swell of only 1 percent after prolonged exposure to chloraminated water.
Meets FDA §177.2600:
Datwyler 5778 seals are approved for repeated use in food handling equipment.
Excellent wear resistance:
Datwyler 5778 internally lubricated seals held up for more than 750,000 cycles of faucet opening and closing.
Wide range of service temperatures:
Datwyler 5778 seals are suitable for applications ranging from -40 to +200°F.
Chemical Resistance
USE WITH
DO NOT USE WITH
Acetone
Automotive Brake Fluid
Skydrol
Steam
Water
Automatic Transmission Fluid
Gasoline
Military Aircraft Hydraulic Fluid
Typical Values for Compound 5778-70 General-purpose EPDM
Section of Spec.
Physical Property
Requirement
Typical Value
ASTM
Test Method
Z1
Z2
Original Properties
Hardness, Shore A
Tensile strength, MPa (psi), min.
Ultimate elongation, pct., min.
Modulus at 100 pct. elongation, psi
Specific gravity
CONCLUSION: Compound 5778-70 meets the requirements of ASTM D2000 M2DA714 B36 EA14 F19 G11 G21 Z1 Z2 Z3 Z4.
ASTM is the acronym for the American Society for Testing and Materials. IRM is the acronym for Industry Reference Material.
Source: Test Report 1813.
5778-70 EPDM Seals
Full Line of NSF-61 Seals for Drinking Water Systems
Datwyler seals made from its internally lubricated, peroxide-cured, ethylene-propylene (EPDM) compounds are tailored to the unique needs of water filtration equipment. Datwyler’s 5778 compounds are available in four hardnesses from 50 to 90 Shore A durometer and are certified to NSF/ANSI Standard 61 (“NSF-61”). The enhanced properties of Datwyler’s 5778 compounds make them ideal for chlorinated or chloraminated water applications. Datwyler recommends its 5778 compounds for faucets, hose bibs, and other residential plumbing fixtures.
5778 Meets Your Needs
1. Excellent Resistance to Chloraminated Water
In most fluids, elastomers reach a plateau in volume swell after several days of exposure. By contrast, chloraminated water has long-term effects on many commonly used seal materials, causing them to continue swelling even after weeks of immersion. In some cases, there appears to be no limit to the degree of swelling that can occur. Datwyler’s 5778 seals are peroxide-cured, giving them high chemical stability. 5778 seals contain no sulfur, so they are compatible with materials commonly used in plumbing fixtures. The seals experience long-term volume swell of only one percent, making them suitable in chloraminated or chlorinated water.
2. Enhanced Resistance to Compression Set
When installed, seals must resist taking a set from compression. When a seal takes a set, it no longer exerts force on the mating surfaces, resulting in leakage. A compound with low compression set, like our 5778 EPDM compounds, better maintain their elastomeric properties and original thickness, preserving seal integrity. Seals made from Datwyler’s 5778 compounds provide excellent resistance to compression set at higher temperatures. After testing for 22 hours at 212°F, 5778-70 seals had a compression set of only 11 percent.
Key Features
Datwyler’s 5778 EPDM compounds are designed for chloraminated water applications. Key features include the following:
Certified to NSF/ANSI Standard 61:
Datwyler 5778 seals are approved for materials used in drinking water service (listed for maximum exposure of seal material 1.3 in2/liter of commercial hot water at 180°F; listing includes domestic hot and cold water).
Excellent resistance to chloraminated water:
Datwyler 5778 seals had volume swell of only 1 percent after prolonged exposure to chloraminated water.
Meets FDA §177.2600:
Datwyler 5778 seals are approved for repeated use in food handling equipment.
Excellent wear resistance:
Datwyler 5778 internally lubricated seals held up for more than 750,000 cycles of faucet opening and closing.
Wide range of service temperatures:
Datwyler 5778 seals are suitable for applications ranging from -40 to +200°F.
Chemical Resistance
USE WITH
DO NOT USE WITH
Acetone
Automotive Brake Fluid
Skydrol
Steam
Water
Automatic Transmission Fluid
Gasoline
Military Aircraft Hydraulic Fluid
Typical Values for Compound 5778-70 General-purpose EPDM
Section of Spec.
Physical Property
Requirement
Typical Value
ASTM
Test Method
Z1
Z2
Original Properties
Hardness, Shore A
Tensile strength, MPa (psi), min.
Ultimate elongation, pct., min.
Modulus at 100 pct. elongation, psi
Specific gravity
Thanks for reaching out to us.
We follow tough standards in how we manage your data at Datwyler.
That’s why you’ll now receive an e-mail from us to confirm your request.
If you don’t receive a message, please check your junk folder.
Products & Services 
