2-Way Ball Valve
Metal-seated & gas-tight for demanding applications
Our 2-way ball valves are designed for applications where standard valves reach their limits: high pressures, high temperatures, high actuation frequencies, or demanding media. The metal-to-metal sealing system achieves 0-bubble leakage (leak rate A) and a long service life. At the same time, we manufacture application- and customer-specific solutions where technically feasible.
AST
High Performance, trunnion-mounted ball
For high cycling frequencies, high-pressure applications, and demanding safety/functional extensions.
asf
Universal ball valve, floating ball
For demanding applications with high requirements for tightness, service life, and emissions.
asfg
Universal ball valve, floating ball
For small nominal sizes and very high pressures with threaded connections
(single or double-sided).
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More InformationReliable Shut-off
Our Metal-to-Metal Sealing System
Metal-to-metal sealing ball valves are designed for applications where soft-seated systems reach their limits. They are used wherever demanding media, extreme pressures and temperatures, or high cycle operations require a permanently reliable shut-off. The gas-tight sealing system meets leak rate A and ensures a permanently reliable shut-off.
The tightness of our valves is verified through technical testing in accordance with the relevant regulations and the applicable product standard. Our internal manufacturer standard exceeds the requirements of common testing standards such as API 598 and DIN EN 12266. In this way, we create a resilient basis for very high shut-off tightness in demanding applications. The internal definition of leak rate A is based on ISO 5208.
The metal-to-metal sealing between the ball and seat rings ensures high wear resistance, minimized maintenance, and a long service life.
For Safe Operation
Safety Concepts
Depending on plant requirements, our ball valves can be equipped with additional safety and functional options. The selection of suitable concepts depends on the medium, pressure direction, test requirements, actuation frequency, and the customer’s operational and maintenance concepts.
Hartmann Valves’ trunnion-mounted ball valves can be designed with both double block and bleed (DBB) function and double isolation and bleed (DIB) function.
The DBB function can be implemented in a single valve (seals on both sides on the upstream side with a bleed connection for venting/testing) (Hartmann Type AST), or as a Twin Ball Valve with two separate balls (Hartmann Types TSF and TST).
To implement the DIB function, Hartmann Valves uses double piston seat systems that can seal in both directions. Double piston seat systems on both sides (DIB1) are mainly used for gases, while single-sided double piston seat systems (DIB2) are suitable for all media due to the resulting cavity relief. By using double piston seat systems, two barriers can be created in one direction within a single valve. When these systems are used in a Twin Ball Valve with two separate balls, up to four barriers can even be achieved in the direction of pressure. Thus, these functions can significantly increase the safety of plants.
High Performance: High Pressure/High Cycle
Ball Valve Type AST
Hartmann ball valves of the AST series are characterized by their trunnion-mounted ball. The design is engineered for high cycling frequencies, extreme pressure ranges, and extended safety or functional concepts.
Blowout-safe operating spindles, floating and self-centering seat rings with pre-tensioned spring elements, and line pressure-dependent sealing force ensure high operational safety.
For trunnion-mounted balls, automatic body pressure relief and Double Block and Bleed enable additional safety functions. The upper operating spindle seals are replaceable even at full line pressure. Furthermore, the valves are fire-safe according to DIN EN ISO 10497 / API 607, anti-static, and maintenance-free.
Temperature
-200 to +750°C
Pressure
up to 1035 bar (15,000 psi)
Nominal sizes
DN8 to DN1000 (½" to 40")
PED 2014/68/EU and API 6D:
- DN 15-300 (1/2″-12″) up to PN 690 (ANSI 4500)
- DN 40-500 (1 1/2″-20″) up to PN 420 (ANSI 2500)
- DN 100-700 (4″-28″) up to PN 250 (ANSI 1500)
- DN 200-900 (8″-36″) up to PN 150 (ANSI 900)
- DN 1000 (40″) up to PN 100 (ANSI 600)
Further nominal sizes and pressure ratings on request!
API 6A:
- 1 13/16“ – 2 1/16” up to API 10,000
- PSL 1 – PSL 3G
- Temp. Class K – Y
Further nominal sizes and pressure ratings on request!
Design options
- Custom face-to-face lengths
- Individual connections, e.g., weld ends, weld sockets
- Reduced bore
- With stem extension for insulation
- With locking device (without lock)
- With limit switch unit
- With pneumatic, electric, or hydraulic actuators
- As Twin Ball Valve with two balls in one body
- As heated version
- With seal weld and pressure-resistant cap
- With Double Piston Effect (DIB)
- With or without drain and vent connections
- With fully metal seated drain ball valves
Material Options
- Special body materials
- Special materials for internal parts (media-wetted)
- Special O-ring materials (e.g., FFKM)
• for media incompatibility of FKM
• for lower (down to -60°C) or higher temperatures (up to +300°C) Higher temperatures up to +750°C
Application Options
- Oxygen compatible
• Body material according to DGUV Information 213-073 Oxygen and EIGA
• Sealing parts tested for O₂ burn-out safety
• Production and delivery oil- and grease-free for oxygen - High-Cycle Applications
FACE-TO-FACE DIMENSIONS ASME FLANGE DESIGNS (ASME 16.10)
| #600 RF | #600 RTJ | #900 RF | #900 RTJ | #1500 RF | #1500 RTJ | #2500 RF | #2500 RTJ | |
|---|---|---|---|---|---|---|---|---|
| DN 1″ | 216 mm | 216 mm | 254 mm | 254 mm | 254 mm | 254 mm | 308 mm | 308 mm |
| DN 2″ | 292 mm | 295 mm | 368 mm | 371 mm | 368 mm | 371 mm | 451 mm | 454 mm |
| DN 3″ | 356 mm | 359 mm | 381 mm | 384 mm | 470 mm | 473 mm | 578 mm | 584 mm |
| DN 4″ | 432 mm | 435 mm | 457 mm | 460 mm | 546 mm | 549 mm | 673 mm | 683 mm |
| DN 6″ | 559 mm | 562 mm | 610 mm | 613 mm | 705 mm | 711 mm | 914 mm | 927 mm |
| DN 8″ | 660 mm | 664 mm | 737 mm | 740 mm | 832 mm | 841 mm | 1022 mm | 1038 mm |
| DN 10″ | 787 mm | 791 mm | 838 mm | 841 mm | 991 mm | 1000 mm | 1270 mm | 1292 mm |
| DN 12″ | 838 mm | 841 mm | 965 mm | 968 mm | 1130 mm | 1146 mm | 1422 mm | 1445 mm |
| DN 14″ | 889 mm | 892 mm | 1029 mm | 1038 mm | 1257 mm | 1276 mm | ||
| DN 16″ | 991 mm | 994 mm | 1130 mm | 1140 mm | 1384 mm | 1407 mm | ||
| DN 18″ | 1092 mm | 1095 mm | 1219 mm | 1232 mm | 1537 mm | 1559 mm | ||
| DN 20″ | 1194 mm | 1200 mm | 1321 mm | 1334 mm | 1664 mm | 1686 mm | ||
| DN 24″ | 1397 mm | 1407 mm | 1549 mm | 1568 mm | 1943 mm | 1972 mm |
Standard Design
Ball Valve Type ASF
Type ASF is the universal series with a floating ball for demanding process applications and provides reliable sealing even under difficult operating conditions.
The design features a two-piece (split body) forged construction and a blowout-safe operating spindle. Floating, self-centering seat rings with pre-tensioned spring elements and line pressure-dependent sealing force ensure reliable sealing even under changing operating conditions.
The upper shaft seals are replaceable at full line pressure. Furthermore, the series is fire-safe according to DIN EN ISO 10497 / API 607, anti-static, and maintenance-free.
Temperature
-46°C to +250°C
Pressure
DN 15 – DN 25: PN 16 to PN 420 / Cl. 150 – Cl. 2500
DN 32 – DN 150: PN 16 bis PN 100 / Cl. 150 – Cl. 600
Media
Suitable for 100% hydrogen and helium, H₂S applications, solids
PED 2014/68/EU and API 6D:
- DN 25 – DN 300 (1“ – 12“) up to PN 420 (ANSI 2500)
Further nominal sizes and pressure ratings on request!
API 6A:
- 1 13/16“ – 7 1/16“ up to API 10,000
- 9“ – 11“ x 10“ up to API 5,000
- 13 5/8“ – 16 3/4″ up to API 3,000
- PSL 1 – PSL 3G
- Temp. Class K – Y
Further nominal sizes and pressure ratings on request!
FACE-TO-FACE DIMENSIONS DIN FLANGE DESIGNS (DIN EN 558)
| PN 16 – PN 40 | PN 63 – PN 100 | PN 160 | PN 250 | PN 400 | ||||
|---|---|---|---|---|---|---|---|---|
| FTF 27 | FTF 1 | FTF 28 | FTF 1 | FTF 2 | FTF 2 | FTF 55 | FTF 56 | |
| DN 15 | 115 mm | 130 mm | – | 130 mm | 210 mm | 210 mm | 216 mm | 264 mm |
| DN 20 | 120 mm | 150 mm | – | 150 mm | – | – | 229 mm | 273 mm |
| DN 25 | 125 mm | 160 mm | – | 160 mm | 230 mm | 230 mm | 254 mm | 308 mm |
| DN 32 | 130 mm | 180 mm | – | 180 mm | – | – | – | – |
| DN 40 | 140 mm | 200 mm | – | 200 mm | – | – | – | – |
| DN 50 | 150 mm | 230 mm | – | 230 mm | 300 mm | – | – | – |
| DN 65 | 170 mm | 290 mm | – | 290 mm | – | – | – | – |
| DN 80 | 180 mm | 310 mm | – | 310 mm | – | – | – | – |
| DN 100 | 190 mm | 350 mm | – | 350 mm | 430 mm | – | – | – |
| DN 125 | 325 mm | 400 mm | – | 400 mm | – | – | – | – |
| DN 150 | 350 mm | 480 mm | 450 mm | 480 mm | 550 mm | – | – | – |
FACE-TO-FACE DIMENSIONS ASME FLANGE DESIGNS (ASME 16.10)
| #150 RF | #300 RF | #600 RF | #600 RTJ | #900 / #1500 | #2500 | |
|---|---|---|---|---|---|---|
| DN 1/2″ | 108 mm | 140 mm | 165 mm | 163 mm | 216 mm | 264 mm |
| DN 3/4″ | 117 mm | 152 mm | 191 mm | 191 mm | 229 mm | 273 mm |
| DN 1″ | 127 mm | 165 mm | 216 mm | 216 mm | 254 mm | 308 mm |
| DN 1 1/4″ | 140 mm | 178 mm | 229 mm | 229 mm | – | – |
| DN 1 1/2″ | 165 mm | 191 mm | 241 mm | 241 mm | – | – |
| DN 2″ | 178 mm | 216 mm | 292 mm | 295 mm | – | – |
| DN 2 1/2″ | 191 mm | 241 mm | 330 mm | 333 mm | – | – |
| DN 3″ | 203 mm | 283 mm | 356 mm | 359 mm | – | – |
| DN 4″ | 229 mm | 305 mm | 432 mm | 435 mm | – | – |
| DN 6″ | 394 mm | 403 mm | 559 mm | 562 mm | – | – |
Design options
- Custom face-to-face lengths
- Individual connections, e.g., weld ends, weld sockets
- Reduced bore
- With stem extension for insulation
- With locking device (without lock)
- With limit switch unit
- With pneumatic, electric, or hydraulic actuators
- As Twin Ball Valve with two balls in one body
- As heated version
- With seal weld and pressure-resistant cap
Material Options
- Special body materials
- Special materials for internal parts (media-wetted)
- Special O-ring materials (e.g., FFKM)
• for media incompatibility of FKM
• for lower (down to -60°C) or higher temperatures (up to +300°C)
Application Options
- Oxygen compatible
• Body material according to DGUV Information 213-073 Oxygen and EIGA
• Sealing parts tested for O₂ burn-out safety
• Production and delivery oil- and grease-free for oxygen
Standard Design
Ball Valve Type ASFG
Hartmann Valves ball valves of the ASFG series are metal-seated 2-way ball valves with a floating ball in a two-piece design. They are designed for small nominal sizes with high pressure requirements and offer a robust, durable sealing solution with full bore due to hardfaced ball and seat ring surfaces.
A single-sided spring-loaded seat ring, line pressure-dependent sealing force, and a triple shaft sealing with blowout-safe operating spindle ensure high operational safety. Threaded or flanged connections, as well as a welded design (Type ASFS), are possible depending on requirements.
Temperature
-46°C to +250°C
Pressure
PN 16 to PN 750/Cl. 150 – Cl. 4500
Media
Suitable for 100% hydrogen and helium, H₂S applications, solids
THREADS (SOCKET OR SPIGOT) – FACE-TO-FACE DIMENSIONS DN/PN/CLASS
| PN 16-PN 750 | Cl. 150-4500 | |
|---|---|
| DN 15 | 133 mm |
| DN 20 | 170 mm |
| DN 25 | 216 mm |
SINGLE-SIDED THREAD (SOCKET OR SPIGOT), SINGLE-SIDED FLANGE – FACE-TO-FACE DIMENSIONS DN/PN/CLASS
| PN 16-40 | Cl. 150-300 | PN 63-100 | Cl. 600 | PN 63-250 | Cl. 600-1500 | PN 420 | Cl. 2500 | |
|---|---|---|---|---|
| DN 15 | 135 mm | 150 mm | 150 mm | 155 mm |
| DN 20 | 164 mm | 164 mm | 177 mm | 183 mm |
| DN 25 | 210 mm | 210 mm | 216 mm | 224 mm |
Design options
- Custom face-to-face lengths
- Individual connections, e.g., weld ends, weld sockets
- Reduced bore
- With stem extension for insulation
- With locking device (without lock)
- With limit switch unit
- With pneumatic, electric, or hydraulic actuators
- As Twin Ball Valve with two balls in one body
- As heated version
- With seal weld and pressure-resistant cap
Material Options
- Special body materials
- Special materials for internal parts (media-wetted)
- Special O-ring materials (e.g., FFKM)
• for media incompatibility of FKM
• for lower (down to -60°C) or higher temperatures (up to +300°C)
Application Options
- Oxygen compatible
• Body material according to DGUV Information 213-073 Oxygen and EIGA
• Sealing parts tested for O₂ burn-out safety
• Production and delivery oil- and grease-free for oxygen
Certified Safety for Our Ball Valves
Our high-performance valves comply with national and international standards, including:
- TA-Luft 2021 (Emission Control)
- ISO 15848 (for fugitive emissions)
- ATEX (for potentially explosive atmospheres)
- PED 2014/68/EU
- DIN EN ISO 10497 / API 607
- API 6A
- SIL
Submit Technical Inquiry
We support you in all project phases: from planning and design to manufacturing, installation, and regular inspection.
FAQ
What is a 2-way ball valve?
A 2-way ball valve is a shut-off valve with one inlet and one outlet. It serves to fully open or close a medium flow in pipelines. The metal-seated version is suitable for high pressure and temperature ranges as well as demanding media.
Why metal-seated instead of soft-seated?
The metal sealing between the ball and seat ring is resistant to high temperatures, pressure changes, and abrasive media. It remains functional even with contamination and allows for long service life with reduced maintenance.
What versions are available?
2-way ball valves are available in floating or trunnion-mounted designs. Trunnion-mounted systems reduce the operating torque at high pressures and large nominal sizes.
Which standards and certifications are met?
Manufacturing is carried out according to international norms and quality standards. Pressure and leak tests are performed according to EN 12266 or API 598. Optionally, emission tests according to ISO 15848 and fire-safe tests according to API 607 or API 6FA are possible. Material certificates according to EN 10204 (3.1 / 3.2) ensure complete documentation and traceability.
Which actuators can be combined?
Manual operation or automation with electric, pneumatic, or hydraulic actuators. Safety-related quick-closing functions can also be implemented.