GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150

GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150
GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150
GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150
GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150
GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150

GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150

Control valve ZK 313 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.
For equipment in sizes DN25 – 80 two body types are available: straight-through and angle pattern. The body of equipment
sizes DN 100 – 150 is hammer forged and of the angle or Z-type.
A sampling valve is available as optional extra on request.

All internals are exchangeable. Leakage rating Class VI acc. to ANSI FCI 70-2-2003.
For equipment in sizes 1″ – 3″ two body types are available: straight-through and angle pattern. The body of equipment sizes
4″ – 6″ is hammer forged and of the angle or Z-type.
A sampling valve is available as optional extra on request.

The following actuators are available

02: Handwheel (standard), retrofitting of an electric rotary actuator possible

11: Electric rotary actuator B1-F10 EN ISO 5210

12: Electric rotary actuator B1-F14 EN ISO 5210

13: Electric linear actuator

20: Pneumatically operated diaphragm actuator or piston actuator

31: Lever actuator equipped with quarter-turn actuator

40: Hydraulic cylinder

Admissible service pressure [barg] for valve body made from EN materials

(calculated to EN12516-2)

Temperature [°C] 1.0460 1.5415 1.7383 1.4903
100 654 757 822 920
200 561 612 757 920
300 435 483 709 920
400 290 451 628 920
450 225 435 596 810
500 299 435 778
530 151 290 652
570 164 467
600 109 316
630 216
650 154
[barg]
Single stage 40
Three stages 300
Three stages with additional nozzle 370
Component part EN
Body 1.0460
1.5415
1.7383
1.4903
Upper part of body 1.0460
1.4903
Threaded bolt 1.7709

1.4980
Nuts 1.7709

1.4980
  • Butt-weld ends
  • Socket-weld ends
  • Optional flange

GESTRA ZK 313 ASME Class 2500 Control Valve | ZK Radial Stage Nozzle® DN 25–150

GESTRA: The Ultimate Solution for Industrial Steam & Fluid Control Systems

Ultra-High-Pressure Control Valve for Critical & Severe Service Applications

The GESTRA ZK 313 ASME Class 2500 Control Valve is a top-tier severe service control valve engineered for extreme pressure, high temperature, and zero-leakage requirements. Featuring the patented ZK Radial Stage Nozzle® combined with a Tandem Shut-Off design, the ZK 313 delivers maximum pressure reduction, exceptional noise control, and enhanced operational safety.

Available in 1”–6” (DN 25–DN 150), the GESTRA ZK 313 is the preferred solution for power generation, oil & gas, chemical processing, and high-energy fluid systems where standard control valves fail.

The GESTRA ZK 313 is a multi-stage pressure-reducing control valve designed for ultra-high differential pressures. Its ASME Class 2500 rating enables safe operation in the most demanding industrial environments.

Key Specifications:

  • Model: GESTRA ZK 313
  • Pressure Class: ASME Class 2500
  • Sizes: 1″, 2″, 3″, 4″, 6″
  • Nominal Diameter: DN 25 – DN 150
  • Technology: ZK Radial Stage Nozzle®
  • Shut-Off: Tandem Shut-Off (Double Sealing)
  • Media: Steam, water, condensate, high-pressure fluids

✅ ZK Radial Stage Nozzle® Technology

The advanced multi-stage radial pressure reduction system:

  • Distributes pressure drop evenly
  • Prevents cavitation and flashing
  • Minimizes aerodynamic noise
  • Protects valve internals from erosion

✅ Tandem Shut-Off for Maximum Safety

The dual-seat tandem shut-off design ensures:

  • Superior tightness
  • Reduced leakage rates
  • Increased operational safety
  • Compliance with critical isolation requirements

✅ ASME Class 2500 Extreme Pressure Rating

Engineered for ultra-high-pressure steam and fluid control, ideal for severe service applications.

✅ Wide Size Range (DN 25 – DN 150)

Supports both compact installations and large-scale industrial pipelines.

✅ Heavy-Duty German Engineering

Manufactured to the highest standards for long service life, reliability, and minimal maintenance.

Technology Operational Benefit
Multi-stage pressure reduction Protects downstream equipment
Radial nozzle flow path Reduces turbulence & vibration
Tandem shut-off seats Enhanced sealing performance
Hardened trim materials Exceptional erosion resistance
Precision flow control Stable and accurate regulation

The GESTRA ZK 313 ASME Class 2500 Control Valve is widely used in:

  • Power plants & boiler systems
  • Main steam & bypass lines
  • Oil & gas upstream and downstream
  • Chemical & petrochemical processing
  • Refinery severe service applications
  • High-energy fluid and utility systems

It is ideal where zero leakage, safety, and long-term reliability are critical.

🔹 Designed for the Most Extreme Conditions

Standard valves cannot handle the pressure, noise, and erosion challenges that the ZK 313 is built for.

🔹 Lowest Total Cost of Ownership

Extended service intervals and reduced maintenance result in long-term operational savings.

🔹 Proven GESTRA / Gestramat® Quality

Trusted globally in critical energy and process industries.

By combining multi-stage pressure reduction with tandem shut-off technology, the ZK 313:

  • Prevents downstream damage
  • Minimizes operational risk
  • Reduces plant noise levels
  • Ensures reliable shut-off
  • Maximizes system efficiency

This makes it a mission-critical component in high-pressure industrial systems.

If your application requires an ultra-high-pressure, low-noise, zero-leakage control valve, the GESTRA ZK 313 ASME Class 2500 with ZK Radial Stage Nozzle® and Tandem Shut-Off is the ultimate solution.

📌 Request a quotation now
📌 Datasheets & valve sizing support available
📌 Original Gestramat® products guaranteed
📌 Worldwide shipping & technical support

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