3 Inch Stainless Steel Gate Valve 250 PSI ANSI NSF 61 Certified
This durable 3 inch stainless steel gate valve meets AWWA C509 standards, features a non-rising stem, and is certified to ANSI/NSF 61. Ideal for water supply applications. Click to view full specifications and pricing.
3 Inch Stainless Steel Gate Valve 250 PSI ANSI NSF 61 Certified
The valve body is primarily constructed from stainless steel. The stem is typically made of bronze and is equipped with a forged thrust ring. The standard size is 3 inches (DN80), which falls within the AWWA C509 standard range for valves from 3 to 12 inches.
Common connection methods include flanged ends, conforming to ASME/ANSI Class 150 standards. In terms of actuation design, the main types are non-rising stem and outside stem and yoke (OS&Y). For the 3-inch size, the design working water pressure is typically 200 psig (approximately 13.8 bar), with some specifications requiring a working pressure of 250 psi.
3 Inch Stainless Steel Gate Valve
A key feature of this valve is that the disc and guide blocks are fully rubber-enclosed, which effectively prevents wear and reduces operating torque. Additionally, the stuffing box employs O-ring seals and uses Grade 304 stainless steel nuts and bolts. The internal and external ferrous surfaces of the valve are coated with a fusion-bonded epoxy coating to enhance corrosion resistance.
| 3 Inch (DN80) | |
| 200-250 psi (Working Pressure) | |
| 500 psi | |
| ASME/ANSI Class 150 Flange | |
| Non-Rising Stem | |
COVALVE's 3 Inch Stainless Steel Gate Valve products meet the ANSI/NSF 61 certification requirements for materials in contact with drinking water and have obtained UL Listing and FM Approval. In the oil and gas industry, the valves also comply with international standards such as ISO 15761 for NPS 3 specifications.
- A: The valve utilizes a stuffing box design with O-ring seals. O-rings are installed both above and below the stem thrust ring, and Grade 304 stainless steel fasteners are used to enhance sealing reliability.
- A: It is primarily applicable to water systems, designed for applications where the fluid velocity does not exceed 16 feet per second when the valve is fully open.
Q: What is the pressure testing standard for this 3 inch stainless steel gate valve?
- A: According to water supply system specifications, each valve seat is factory-tested at 250 psi, and each valve shell is tested at 500 psi.
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