API 602 Gate Valves
Built to Perform.
Gate Valve Manufacturer for Distributors
For over 70 years, Smith Valves has manufactured API 602 forged steel gate valves for the jobs your customers can’t afford to get wrong — including hydrofluoric acid, chlorine, and oxygen service. When you quote Smith, you’re quoting a valve with the specs, the documentation, and the U.S. inventory to back it up.
About Industrial Gate Valves
Reliable forged steel gate valves are the go-to choice when a system needs to do one of two things: shut flow off completely or let it run wide open. There’s no in-between — and that is exactly why gate valves remain a mainstay in high-pressure petrochemical, oil and gas, and other severe-service piping systems.
Smith Valves manufactures forged gate valves to API 602 and ASME B16.34 standards, in an available outside stem and yoke (OS&Y) design. Available in Class 150–2500, with conventional or full ports and a range of end connections, including threaded, socketweld, buttweld, and flanged. Every valve includes API 624-qualified packing for low fugitive emissions.
As one of the longest-operating manufacturers of API 602 forged steel valves in the industry, Smith Valves has spent 70+ years specializing in flow control for hydrofluoric acid, chlorine, oxygen, and other harsh process environments. These are applications where a valve failure isn’t just downtime — it’s a safety event.
Our Forged Steel Gate Valve Line
Standard Gate
OS&Y design, available in Class 150–2500 with conventional or full port. Compliant with API 591/598/602/624, ASME B16.34, NACE MR-0175, and NACE MR-0103. Click the tab to the right for more details and specs.
Extended Body Gate
OS&Y design, available in Class 800 and 1500, with take-off design and IREB extended ends. Compliant with API 598/602, ASME B16.34, NACE MR-0175, and NACE MR-0103. Click the tab to the right for more details and specs.
Bellows Seal Gate (B800/B870)
OS&Y design, bolted or welded bonnet, conventional port. Compliant with API 598/602/624, ASME B16.34, NACE MR-0175, and NACE MR-0103. Designed to eliminate stem leakage in hazardous media. Click the tab to the right for more details and specs.
Cryogenic Gate
OS&Y design, Class 150–1500, conventional port. Compliant with API 598/602, ASME B16.34, NACE MR-0175, and NACE MR-0103. Click the tab to the right for more details and specs.
Smith Forged Gate Valves feature an outside stem and yoke (OS&Y) design and are available in Class 150–2500. They are offered with conventional or full ports and a variety of end connections, including threaded, socketweld, buttweld, and RF ends. All valves are manufactured in accordance with API 602 and ASME B16.34 standards and include API 624 qualified packing for low emissions.
Styles
0800/0870, 0888/5870, 0850/0890, 1500/1570, 1588/1578, 2578, 0815, 0830, 0860, 5815, 5830, 0895, 2595
Sizes
1/4” – 3”
Pressure Class
150, 300, 600, 800, 1500, 2500
Design Specifications & Compliance
- API 591/598/602/624
- ASME B16.34
- NACE MR-0175
- NACE MR-0103
End Connections
- Threaded
- Socketweld
- Flanged
- Buttweld
Bonnet Designs
- Bolted
- Welded
Materials
Large scope of materials and trims available
Smith Extended Body Gate Valves feature an outside stem and yoke (OS&Y), are available in Class 800 and 1500, and have conventional ports with state available in take-off design and IREB extended ends. All are manufactured in accordance with API 602 and ASME B16.34 standards.
Styles
0811/0876, 0812/0877, 0813/0878, 0814/0879, 1577, 0874, 0875, 1575
Sizes
1/2” – 2”
Pressure Class
800, 1500
Design Specifications & Compliance
- API 598/602
- ASME B16.34
- NACE MR-0175
- NACE MR-0103
End Connections
- Threaded
- Socketweld
- IREB
Materials
Large scope of materials and trims available
Smith B800 / B870 Bellow Seal Gate Valve features an outside stem and yoke (OS&Y), bolted / welded bonnet and conventional port with either threaded, socketweld or RF ends. All are manufactured in accordance with API 602 and ASME B16.34 standards.
Styles
B800, B870, B815, B830, B860
Sizes
1/2” – 2”
Pressure Class
150, 300, 600, 800
Design Specifications & Compliance
- API 598/602/624
- ASME B16.34
- NACE MR-0175
- NACE MR-0103
End Connections
- Threaded
- Socketweld
- Flanged
- Buttweld
Bonnet Designs
- Bolted
- Welded
Materials
Large scope of materials and trims available
Smith Cryogenic Gate Valves feature an outside stem and yoke (OS&Y), are available in Class 150-1500 with conventional ports and either threaded, socketweld or RF ends. All are manufactured in accordance with API 602 and ASME B16.34 standards.
Styles
C800, C870, C815, C830, C860, CT15
Sizes
1/2” – 2”
Pressure Class
150, 300, 600, 800, 1500
Design Specifications & Compliance
- API 598/602
- ASME B16.34
- NACE MR-0175
- NACE MR-0103
End Connections
- Threaded
- Socketweld
- Flanged
- Buttweld
Bonnet Designs
- Bolted
- Welded
Materials
Large scope of materials and trims available
Ready to Stock Smith Valves?
When your customers demand API 602 forged steel valves for severe-service hydrofluoric acid, chlorine, or oxygen loops, you need inventory you can stake your reputation on.
Smith Valves delivers unmatched domestic stock, rapid turnaround, and rigorous in-house NDE testing—keeping your shelves stocked and your customers on schedule.
End user or EPC? Ask your distributor for Smith Valves by name. Don’t have a Smith distributor yet? Contact us and we’ll connect you with one.
FAQs About Industrial Gate Valves
What Is a Gate Valve Used For?
A gate valve is an industrial valve designed for complete on/off flow isolation under high pressure; not for throttling. Inside the valve body, a solid or flexible wedge moves up and down (frequently in a rising stem gate valve design) to shut off or clear the fluid path. When fully open, it offers minimal resistance to fluid flow. Unlike a globe valve, which is built to throttle flow, or a quarter-turn ball or butterfly valve, a gate valve is designed to sit fully open or fully closed — making it a go-to for isolation in oil and gas, petrochemical, and power generation piping
Are Gate Valves Obsolete?
No. While quarter-turn options like ball or butterfly valves have taken over some general isolation duties, gate valves remain the industry standard for high-pressure, full-bore isolation where low pressure drop is essential.
Cast steel gate valves handle larger line sizes, while compact forged steel gate valves (typically NPS 4 and under) are preferred for high-pressure, small-bore, and hazardous service — where forged construction remains the standard for critical process lines.
What Are the Types of Gate Valves?
Across the industry, common valve types include the wedge gate valve, the double disc gate valve, and specialized units such as a slide gate valve or knife gate valve. As a specialized forged gate valve manufacturer, Smith Valves builds four primary categories engineered for severe service where standard industrial valves are unsuitable:
- Standard gate: Class 150–2500, available with a bolted bonnet or welded bonnet.
- Extended body gate: Class 800–1500, engineered for take-off and extended-end setups.
- Bellows seal gate: Class 150–800, designed to eliminate stem leakage in severe or hazardous media.
- Cryogenic gate: Class 150–1500, designed for low-temperature applications.
These robust gate valves provide reliable, long-term isolation where equipment failure is not an option.
What Compliance Standards Matter for Gate Valves?
The core standards for valve manufacturing include API 602, which governs compact forged steel and stainless steel designs, and ASME B16.34 for pressure-temperature ratings. Furthermore, API 598 dictates testing and inspection standards, API 624 certifies low fugitive emissions at the stem/bonnet packing, and NACE MR-0175 and MR-0103 specify material requirements for sour or corrosive environments. Smith Valves manufactures every industrial gate valve strictly to the standards listed for each product line to ensure every unit is a dependable, quality product.
How Do I Choose a Gate Valve Manufacturer?
When evaluating a gate valve supplier or manufacturer, look for in-house testing capabilities, strict API 602, API 591, and ASME B16.34 compliance, a broad pressure range, and proven performance in severe chemical service. Smith Valves is a premier gate valve manufacturer and supplier with a specific niche focus. Distributors should also weigh inventory depth and how readily the manufacturer provides documentation, since both affect whether you can hold the delivery date and close out the job cleanly. Backed by 70+ years of specialized valve manufacturing, Smith Valves crafts forged steel gate valve products engineered for hydrofluoric acid, chlorine, and oxygen service — applications that demand specialist knowledge.
Does Smith Valves Work With Distributors?
Yes. Smith Valves partners with distributors who supply forged steel gate valves for severe-service, high-pressure, and hazardous-media applications. Request a quote or download our catalog to get started, and our team will help you scope the application and quote the right configuration.