What is a gate valve used for?

It’s used to start or stop the flow in a pipeline.

Can a gate valve be used for flow control?

No, it’s not suitable for throttling.

Is a gate valve better than a ball valve?

Each has different uses—gate valves are better for isolation in large systems.

What media can gate valves handle?

They can handle water, oil, gas, steam, and slurry.

How do I know if a gate valve is open or closed?

In rising stem types, the stem position indicates the valve status.

Valvole a saracinesca

Metal Seated RS Gate Valve

Valve Type Rising Stem Gate Valve (OS&Y – Outside Screw & Yoke)
Body Material Cast Iron (ASTM A126 Class B / EN-GJL-250)
Seat Material Bronze (Integral or renewable)
Stem Material Brass (C36000 / C37700)
End Connection Flanged (ASME B16.1 Class 125 / EN 1092-2)
Operation Handwheel
Design Standard MSS SP-70 / ASME B16.34 (mod)
Face-to-Face ASME B16.10 / MSS SP-70 (Flanged ends)
Flange Dimension ASME B16.1 Class 125 / EN 1092-2 PN10/PN16
Inspection & Test API 598 / MSS SP-70
Pressure Rating Class 125 / PN10 / PN16
Size Range 2″ – 12″ (DN50 – DN300)

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Non-Rising Stem Rubber Seated Gate Valve

1. Valve Type Non-Rising Stem (NRS) Resilient Wedge Gate Valve
2. Design Standard AWWA C509, ISO 5208, BS EN 1074-1
3. Size Range DN50 to DN600 (2″ to 24″)
4. Pressure Rating PN10/PN16 (150 psi / 230 psi)
• Test Pressure: 1.5×PN (Shell), 1.1×PN (Seat)
5. Temperature Range -10°C to +80°C (Standard EPDM)
-30°C to +130°C (Optional FKM)

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NRS Metal Seated Gate Valve(Key)

Valve Type Non-Rising Stem Gate Valve (Inside Screw)
Body Material Cast Iron (ASTM A126 Class B / EN-GJL-250)
Seat Material Bronze (Integral or renewable)
Stem Material Brass (C36000 / C37700)
End Connection Threaded (Female NPT per ASME B1.20.1)
Operation Square Head (For wrench operation)
Design Standard MSS SP-70 / MSS SP-80 (Bronze trim) / ASME B16.34 (mod)
Face-to-Face Manufacturer standard per MSS SP-70 (Threaded ends)

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NRS Metal-Seated Gate Valve

Nominal Diameter (DN) mm DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600
Nominal Pressure (PN) Bar PN10 / PN16 / PN25
Working Pressure – Max allowable pressure decreases as temperature increases (Refer to Pressure-Temperature rating chart)

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Open Die-Forged Gate Valve （PSB）

Nominal Size (NPS) 1/2″ ~ 2″ (DN15 ~ DN50)
Pressure Class Class 1500 / Class 2500 / Class 4500 (Custom)
Connection Type Butt-Weld Ends (BW) conforming to ASME B16.25 Temperature Range -29°C ~ +550°C (-20°F ~ +1022°F) Applicable Media High-pressure steam, Hot water, Oil & Gas, Power generation applications
Design Standard API 602 / ASME B16.34 / ISO 15761

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Plumbing Gate Valve Flanged

Valve Type Inside Screw, Non-Rising Stem Gate Valve
Bonnet Connection Threaded (Screwed) • Tapered Thread (BSPT/NPT)
Size Range ¼” to 4″ (DN8 to DN100)
Body/Bonnet Material 59-1 Brass (CuZn40Pb2 • GB/T 5231)
Stem 59-1 Brass • ACME Thread (Inside Body) • Square Head for Wrench
Disc Solid Brass Wedge (59-1) • Flexible Design
Seat Integral Body Seat (Machined Brass)
Seals EPDM Stem O-rings (Standard) • Optional: PTFE/VITON®

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DN800-PN16 Cast Iron Metal Seated Non-Rising Stem Gate Valve

Nominal Size DN800 (32″)
Pressure Rating PN16
End Connection Flanged Ends
Flange Standard DIN EN 1092-2 (PN16, Ductile Iron Flanges, Flat Face / Raised Face)
Face-to-Face Dimension DIN3352 F4 / DIN EN 558 Series 1 (470 mm)
Design & Manufacture Standard DIN3352 (Part 4 / Type F4)
Test & Inspection Standard DIN EN 12266-1

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DN400 PN16 Cast Iron Metal Seated Rising Stem Gate Valve

• Type: Outside Screw and Yoke (OS&Y), Solid Wedge, Flanged Ends
• Seat Type: Metal-to-Metal (Bronze Seated)
• Stem Design: Rising stem (indicates open/close position)
• Operation: Handwheel Operated (Gearbox is mandatory for this size due to high seating torque of metal seals)
• Application: High-temperature fluids, Oils, Steam, Abrasive media, or where rubber is not suitable.

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4″-5000 PSI-BW API 6A DM Mud Gate Valve

Nominal Size 4″ (DN 100)
Rated Working Pressure 5000 PSI (35 MPa / 345 bar)
End Connection Butt Weld (BW)
Valve Type Mud Gate Valve
Structure Rising Stem
Operation Manual (Hand Wheel Operated)
Sealing Type Metal-to-Rubber / Metal-to-Metal
Temperature Range P-U: -20°F to 250°F (-29°C to 121°C)
Service Media Drilling Mud, Water, Natural Gas, Oil, Sour Gas (H₂S/CO₂)

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3″ – 5000 PSI – BW API 6A DM Mud Gate Valve

Nominal Size 3″ (DN 80)
Rated Working Pressure 5000 PSI (35 MPa / 345 bar)
End Connection Butt Weld (BW)
Valve Type Mud Gate Valve
Structure Rising Stem
Operation Manual (Hand Wheel Operated)
Sealing Type Metal-to-Rubber / Metal-to-Metal
Temperature Range P-U: -20°F to 250°F (-29°C to 121°C)
Service Media Drilling Mud, Water, Natural Gas, Oil, Sour Gas (H₂S/CO₂)

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2″ – 5000 PSI – BW API 6A DM Mud Gate Valve

Nominal Size 2″ (DN 50)
Rated Working Pressure 5000 PSI (35 MPa / 345 bar)
End Connection Butt Weld (BW)
Valve Type Mud Gate Valve
Structure Rising Stem
Operation Manual (Hand Wheel Operated)
Sealing Type Metal-to-Rubber / Metal-to-Metal
Temperature Range P-U: -20°F to 250°F (-29°C to 121°C)
Service Media Drilling Mud, Water, Natural Gas, Oil, Sour Gas (H₂S/CO₂)

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Una valvola a saracinesca è un tipo di valvola utilizzata per interrompere o consentire completamente il flusso in una condotta sollevando o abbassando una barriera solida (la saracinesca) nel percorso del fluido. È progettata principalmente per il controllo on/off piuttosto che per la regolazione del flusso. Quando la valvola è completamente aperta, la saracinesca si solleva completamente, consentendo un flusso senza ostacoli con una caduta di pressione minima. Quando è chiusa, la saracinesca si sigilla ermeticamente per interrompere completamente il flusso. Le valvole a saracinesca sono più efficaci nei sistemi in cui la valvola rimane completamente aperta o completamente chiusa per periodi prolungati. Non sono ideali per scopi di strozzamento perché la saracinesca parzialmente aperta può vibrare, causando usura e potenzialmente danneggiando la valvola. Queste valvole sono ampiamente utilizzate in sistemi di approvvigionamento idrico, oleodotti e gasdotti e applicazioni industriali grazie alla loro struttura robusta e alla capacità di gestire pressioni e temperature elevate. I materiali comuni includono ghisa, acciaio inossidabile e ottone, con opzioni su misura per fluidi e ambienti specifici. Le valvole a saracinesca sono note per la loro durata, la tenuta stagna e la lunga durata, il che le rende la scelta preferita in molte applicazioni gravose.