| Resilient-Seated Wedge Gate Valve | DN50–DN1200 | PN10, PN16; selected designs up to PN25 | Approximately 0–80°C, depending on seat material | Potable water, raw water, irrigation water, treated wastewater | Municipal water networks, water treatment plants, fire-water systems, irrigation pipelines | Low operating torque, bubble-tight shutoff when correctly selected, corrosion-resistant coated body options, full-bore flow path | Not intended for throttling; elastomer seat compatibility limits temperature and chemical resistance | Select an actuator with sufficient closing torque for pressure differential and account for increased torque after long periods without operation |
| Metal-Seated Wedge Gate Valve | DN50–DN1000 | PN16–PN63 or ASME Class 150–300, depending on design | Approximately −29–200°C; higher temperatures require material-specific verification | Water, steam, hydrocarbons, process fluids, non-abrasive gases | Power plants, refineries, industrial process lines, high-temperature utility systems | Better temperature resistance than resilient seats, robust shutoff elements, suitable for demanding industrial service | May permit minor leakage depending on seat class; vulnerable to abrasive particles and incorrect seating operation | Use torque data for the actual pressure, temperature, trim, and differential-pressure conditions; include a safety margin recommended by the valve manufacturer |
| Parallel-Slide Gate Valve | DN50–DN1000 | ASME Class 150–600; PN16–PN100 in selected designs | Approximately −29–450°C, subject to body, disc, seat, and packing materials | Steam, boiler feedwater, hydrocarbons, fuel gas, process fluids | Steam generation, power generation, oil and gas processing, high-temperature process isolation | Suitable for high-temperature isolation, reduced wedging forces, commonly used where thermal expansion is significant | Not a throttling valve; sealing performance depends on pressure direction, seat design, and operating conditions | Check actuator thrust as well as torque, especially for large valves, high differential pressure, and steam-service thermal cycles |
| Rising-Stem Wedge Gate Valve | DN50–DN1000 | PN16–PN63 or ASME Class 150–600 | Approximately −29–200°C for common industrial materials | Water, steam, oil, gas, and general process fluids | Above-ground pipelines where valve position indication and easy maintenance are priorities | Visible stem position, straightforward inspection, generally good isolation performance | Requires sufficient vertical clearance; the exposed stem needs protection from impact, corrosion, and contamination | Confirm actuator mounting height, stem travel, limit-switch setting, and available overhead space before purchase |
| Non-Rising-Stem Gate Valve | DN50–DN1200 | PN10–PN25; higher ratings are available in selected industrial designs | Approximately 0–80°C for common resilient-seated water designs | Water and compatible low-temperature utility fluids | Buried water pipelines, valve chambers, compact installations, underground distribution systems | Compact installation height, suitable for confined spaces, commonly available with buried-service accessories | Stem position is not visually obvious; stem threads may be exposed to the line medium and require suitable protection | Use a weatherproof or buried-service actuator arrangement and verify stem nut compatibility, extension length, and position indication |
| Knife Gate Valve | DN50–DN1600 | Typically PN6–PN16; pressure rating varies significantly by body and seat design | Approximately 0–110°C for common elastomer-seated designs | Pulp stock, slurries, wastewater, powders, dry bulk solids, fibrous fluids | Pulp and paper, mining, mineral processing, wastewater treatment, bulk-material handling | Thin wafer or lug body, effective for fluids containing solids, relatively low installation weight | Often unsuitable for high-pressure clean-fluid service; seat wear, leakage, and abrasive damage must be evaluated | Select actuator thrust and travel for solids service; consider flushing ports, stem protection, and fail-position requirements |
| Forged High-Pressure Gate Valve | DN15–DN100 | ASME Class 600–2500 | Approximately −29–500°C, depending on pressure class and material | Steam, high-pressure water, oil, gas, and process fluids | Power stations, high-pressure manifolds, oil and gas facilities, boiler and process piping | High pressure capability, compact forged body, strong pressure-boundary integrity | Higher purchase and maintenance cost; actuator sizing can be demanding because of high seating and unseating loads | Require documented torque or thrust curves at operating temperature and pressure; verify actuator duty cycle for frequent operation |
| Cryogenic Extended-Bonnet Gate Valve | DN15–DN600 | ASME Class 150–600 or equivalent pressure ratings | Approximately −196–−29°C, subject to tested materials and service medium | Liquid nitrogen, liquid oxygen, LNG, liquid argon, and other cryogenic fluids | Gas separation, LNG facilities, cryogenic storage, industrial-gas distribution | Extended bonnet protects packing from extreme cold and supports controlled heat transfer away from the valve seat | Requires strict material compatibility, cleanliness, orientation, and low-temperature testing; oxygen service requires special preparation | Use an actuator rated for the ambient environment and valve operating torque; verify insulation clearance and emergency shutdown requirements |
| Fire-Safe Industrial Gate Valve | DN50–DN1000 | ASME Class 150–600 or PN16–PN63 | Approximately −29–200°C in normal service; fire-test qualification is design-specific | Hydrocarbons, fuels, natural gas, steam, and process fluids | Refineries, petrochemical plants, terminals, tank farms, and hazardous-area process systems | Designed to maintain pressure-boundary integrity and controlled leakage performance after fire exposure when properly tested | Fire-safe construction does not eliminate the need for emergency isolation, hazardous-area certification, or correct installation | Specify actuator enclosure, electrical protection, local controls, and fail-safe requirements according to the site hazardous-area classification |
| Buried-Service Electric Gate Valve | DN50–DN1200 | PN10–PN25 for common water-network designs | Approximately 0–80°C for typical water service | Potable water, irrigation water, raw water, and wastewater where materials are compatible | Underground distribution networks, remote pipelines, smart water infrastructure | Remote operation, reduced access requirements, compatibility with supervisory control systems when properly equipped | Installation must protect electrical components from flooding, soil movement, corrosion, and unauthorized access | Confirm IP protection, submersible rating where required, cable routing, manual override, and remote position feedback |