Description
GESTRA ZK 29 ASME Class 900 Control Valve | ZK Radial Stage Nozzle® DN 25–150
Control valve ZK 29 with ZK radial stage nozzle® designed for reducing high differential pressures in industrial installations and power plants and used as:
- Injection-cooling valve
- Warm-up valve
- Drain valve
- Steam control valve
- Continuous blowdown valve
- Feedwater control valve
- Leak-off valve
All internals are exchangeable. Leakage rate A acc. to EN 12266-1.
Optional extras:
- Connection for sealing fluid
- Adjustable lift stop in the closing direction
- Self-tightening stuffing box
- Sample valve (on request)
Special angle-type bodies are available for all equipment versions.
Types of actuators and operation
The following actuators are available:
01: Handwheel (retrofitting of an electric rotary actuator not possible)
02: Handwheel (standard, retrofitting of an electric rotary actuator – with insert bush form B1 to EN ISO 5210 – possible)
12: Electric rotary actuator (with threaded bush form A to EN ISO 5210)
13: Electric linear actuator 14: Electric rotary actuator (with insert bush form B1 to EN ISO 5210)
20: Pneumatic diaphragm actuator
30: Lever actuator without part-turn actuator attached
31: Lever actuator equipped with quarter-turn actuator
40: Hydraulic cylinder
Pressure & temperature ratings
Admissible service pressure [bar] for valve body made from EN materials (calculated to EN12516-2)
| Temperature [°C] | 1.7335 | 1.7357 |
| 20 | 314 | 272 |
| 200 | 290 | 218 |
| 300 | 278 | 189 |
| 400 | 266 | 165 |
| 500 | 138 | 81 |
| 550 | 49 | 36 |
Admissible differential pressure Δ PMX:
| [barg] | |
| Single stage | 40 |
| Multi stage | 100 |
Types of end connections
- Butt-weld ends
- Socket-weld ends
- Flange PN63, PN100, PN160 Other sizes available on
Materials
| Component part | EN |
| Body DN 25, DN 50 | 1.7335 |
| Body DN 80, DN 100, DN 150 | 1.7357 |
| Bonnet | 1.7357 |
| Cover | 1.7335 |
| Threaded bolt | 1.7709
1.4980 |
| Nuts | 1.7709
1.4980 |
GESTRA ZK 29 ASME Class 900 Control Valve | ZK Radial Stage Nozzle® DN 25–150
GESTRA: The Ultimate Solution for Industrial Steam & Fluid Control Systems
GESTRA ZK 29 ASME Class 900 Control Valve with ZK Radial Stage Nozzle® | DN 25–DN 150 (1”–6”)
High-Pressure Precision Control Valve for Extreme Industrial Applications
The GESTRA ZK 29 ASME Class 900 Control Valve with ZK Radial Stage Nozzle® is a high-performance control valve engineered for extreme pressure and temperature conditions. Designed to meet the most demanding industrial standards, the ZK 29 delivers exceptional pressure reduction, noise suppression, and erosion resistance in critical process systems.
Available in 1”, 2”, 3”, 4”, and 6” (DN 25 – DN 150), this valve is the preferred solution for power plants, steam systems, chemical processing, and high-pressure industrial installations worldwide.
What Is the GESTRA ZK 29 Control Valve?
The GESTRA ZK 29 is a multi-stage pressure-reducing control valve equipped with the patented ZK Radial Stage Nozzle®, specifically developed to handle high differential pressures while minimizing noise, vibration, and cavitation.
Key Specifications:
- Model: GESTRA ZK 29
- Pressure Class: ASME Class 900
- Sizes: 1″, 2″, 3″, 4″, 6″
- Nominal Diameter: DN 25 – DN 150
- Technology: ZK Radial Stage Nozzle®
- Application: Steam, water, condensate, high-pressure fluids
Key Features of GESTRA ZK 29 ASME Class 900
✅ ZK Radial Stage Nozzle® Technology
The advanced radial multi-stage nozzle design ensures:
- Controlled pressure drop distribution
- Reduced flow velocity
- Exceptional noise reduction
- Maximum protection against erosion
✅ ASME Class 900 High-Pressure Rating
Built for extreme operating pressures, making it ideal for critical steam and fluid control applications.
✅ Superior Noise & Cavitation Control
The ZK 29 significantly lowers aerodynamic and hydrodynamic noise, extending equipment life and improving plant safety.
✅ Wide Size Range (DN 25 – DN 150)
Flexible sizing allows seamless integration into both compact systems and large industrial pipelines.
✅ German Engineering Excellence
Manufactured to the highest quality standards, ensuring long service life, reliability, and operational safety.
Technical Advantages of the ZK Radial Stage Nozzle®
| Technical Feature | Operational Benefit |
|---|---|
| Multi-stage pressure reduction | Prevents valve damage |
| Radial flow guidance | Reduces turbulence |
| Optimized nozzle geometry | Minimizes noise |
| Hardened materials | High erosion resistance |
| Precision flow control | Stable process conditions |
Industrial Applications of GESTRA ZK 29 Control Valves
The GESTRA ZK 29 ASME Class 900 Control Valve is widely used in:
- Power generation plants
- High-pressure steam systems
- Chemical & petrochemical industries
- Oil & gas processing facilities
- Refineries and utilities
- Process and energy plants
It is especially effective in applications requiring safe pressure reduction, precise control, and long-term reliability.
Why Choose GESTRA ZK 29 Over Conventional Control Valves?
🔹 Designed for Extreme Conditions
Unlike standard control valves, the ZK 29 is engineered specifically for high differential pressures and severe service applications.
🔹 Lower Total Cost of Ownership
Reduced wear, minimal maintenance, and extended service intervals result in significant lifecycle cost savings.
🔹 Proven Gestramat® Performance
GESTRA products are trusted globally for critical process control and industrial safety compliance.
How GESTRA ZK 29 Improves System Efficiency & Safety
By implementing the ZK Radial Stage Nozzle®, the GESTRA ZK 29:
- Protects downstream equipment
- Stabilizes pressure control
- Reduces plant noise levels
- Prevents cavitation damage
- Ensures continuous, reliable operation
This makes the valve a critical component in high-performance industrial systems.
Buy GESTRA ZK 29 ASME Class 900 Control Valve Today
If your operation requires a high-pressure, low-noise, precision control valve, the GESTRA ZK 29 ASME Class 900 with ZK Radial Stage Nozzle® is the industry-proven solution.
📌 Request a quotation today
📌 Datasheets and technical consultation available
📌 Original Gestramat® product guarantee
📌 Global delivery supported
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PT Totalitas Teknik Indonesia
PT Totalitas Teknik Indonesia
PT Totalitas Teknik Indonesia
