GESTRA RK 86 RK 86A RKE 86 PN 10–40 DN 15–200

Non-Return Valve

GESTRA Non-Return Valve RK 86 RK 86A RKE 86 PN 10–40 DN 15–200
GESTRA Non-Return Valve RK 86 RK 86A RKE 86 PN 10–40 DN 15–200
GESTRA Non-Return Valve RK 86 RK 86A RKE 86 PN 10–40 DN 15–200

GESTRA Non-Return Valve RK 86 RK 86A RKE 86 PN 10–40 DN 15–200

RK and RKE non-return valves are used to prevent the return flow of fluid in pipes.

Only RKE non-return valves may be used as end valves (e.g. vacuum breakers). This equipment has passed the appropriate tests and bears the relevant markings, and must not be used with safety-relevant functions (e.g. safety valves). RKE non-return valves are only available with a metal valve disk.

Wafer-type non-return (check) valves for sandwiching between flanges, designed with closing spring for installation in any position. Without spring only for vertical lines with upward flow. Self-centring valve body. Suitable for liquid, gas and steam. Please note the classification according to the Pressure Equipment Directive (PED).

Type  

T [°C]

 DIN/EN, PN 40  

Design
–200 –10 50 100 200 300 350 400 500 550
RK 86, RKE 86

DN 15 – 100

 p [barg] 40.0 40.0 37.4 33.6 27.8 Metal-to-metal (standard)
p [barg] 40.0 40.0 37.4 33.6 27.8 25.9 Metal-to-metal with Nimonic® springs
RK 86, RKE 86

DN 125 – 200

 p [barg] 40.0 40.0 37.4 33.6 27.8 Metal-to-metal (standard)
p [barg] 40.0 40.0 37.4 33.6 27.8 25.9 24.0 Metal-to-metal with Nimonic® springs

 

Type  

T [°C]

 DIN/EN, PN 40  

Design
–200 –10 50 100 200 300 350 400 500 550
RK 86A, RKE 86A

DN 15 – 100

 p [barg] 40.0 40.0 40.0 38.1 30.2 25.8 Metal-to-metal (standard)
p [barg] 40.0 40.0 40.0 38.1 30.2 25.8 24.6 23.5 22.2 20.7 Metal-to-metal with Nimonic® springs
RK 86A, RKE 86A

DN 125 – 200

 p [barg] 40.0 40.0 40.0 38.1 30.2 25.8 Metal-to-metal (standard)
p [barg] 40.0 40.0 40.0 38.1 30.2 25.8 24.6 23.5 Metal-to-metal with Nimonic® springs

 

Type  

T [°C]

 ASME, CL 300  

Design
–29 –10 50 100 200 300 350 400 500 550
RK 86, RKE 86

DN 15 – 100

 p [barg] 51.1 51.1 46.6 43.8 39.8 Metal-to-metal (standard)
p [barg] 51.1 51.1 46.6 43.8 39.8 37.6 Metal-to-metal with Nimonic® springs
RK 86, RKE 86

DN 125 – 200

 p [barg] 51.1 51.1 51.1 46.6 43.8 39.8 Metal-to-metal (standard)
p [barg] 51.1 51.1 51.1 46.6 43.8 39.8 37.6 34.7 Metal-to-metal with Nimonic® springs

 

Type  

T [°C]

 ASME, CL 300  

Design
–200 –10 50 100 200 300 350 400 500 538
RK 86A, RKE 86A

DN 15 – 100

 p [barg] 49.6 49.6 49.6 42.2 35.7 31.6 Metal-to-metal (standard)
p [barg] 49.6 49.6 49.6 42.2 35.7 31.6 30.3 29.4 28.2 25.1 Metal-to-metal with Nimonic® springs
RK 86A, RKE 86A

DN 125 – 200

 p [barg] 49.6 49.6 49.6 42.2 35.7 31.6 Metal-to-metal (standard)
p [barg] 49.6 49.6 49.6 42.2 35.7 31.6 30.3 29.4 Metal-to-metal with Nimonic® springs

RK 86A, RKE 86A: At operating temperatures above 300°C there is a risk of intercrystalline corrosion. Do not operate the equipment at temperatures above 300°C unless intercrystalline corrosion can be ruled out.

Valve disk/cone tmin [°C] tmax [°C] Application Leakage rate
Metal-to-metal RK(E) 86, DN 15-100 – 10 350 Liquid, gas, steam EN 12266-1, P12, leakage rate C
Metal-to-metal RK(E) 86, DN 125-200 – 10 400 Liquid, gas, steam EN 12266-1, P12, leakage rate C
Metal-to-metal RK(E) 86A, DN 15-100 – 200 550 Liquid, gas, steam EN 12266-1, P12, leakage rate C
Metal-to-metal RK(E) 86A, DN 125-200 – 200 400 Liquid, gas, steam EN 12266-1, P12, leakage rate C
PTFE, DN15 – 100 – 190 250 Aggressive fluids EN 12266-1, P12, leakage rate C
PTFE, DN125 – 200 – 25 200 Aggressive fluids EN 12266-1, P12, leakage rate C
EPDM – 40 150 Water, condensate, steam EN 12266-1, P12, leakage rate A
FPM – 25 200 Mineral oil, gas, air EN 12266-1, P12, leakage rate A

GESTRA RK 86 RK 86A RKE 86 PN 10–40 DN 15–2000

Non-Return Valve

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

In modern industrial piping systems, reliable backflow prevention is essential for protecting equipment and maintaining operational safety. GESTRA Non-Return Valves RK 86, RK 86A, RKE 86, and RKE 86A are precision-engineered wafer-type check valves designed for sandwich installation between flanges.

Supporting PN 10 / 16 / 25 / 40 and ASME Class 125 / 150 / 300, these valves cover DN 15–200 and NPS 1/2–8, making them ideal for a wide range of industrial, steam, condensate, and water applications.

A non-return valve (also known as a check valve) allows flow in one direction while automatically preventing reverse flow. Sandwich-type (wafer) check valves are installed directly between two flanges, offering:

  • Compact design
  • Reduced weight
  • Easy installation
  • Low pressure drop

GESTRA wafer non-return valves combine these advantages with German engineering quality for maximum reliability.

1. Compact Wafer-Type Design

Designed for sandwiching between flanges, GESTRA non-return valves save space and reduce overall system weight while maintaining high mechanical strength.

2. Wide Pressure Class Compatibility

  • DIN: PN 10 / 16 / 25 / 40
  • ASME: Class 125 / 150 / 300
    This ensures compatibility with both DIN and ASME flanged systems worldwide.

3. Broad Size Range

  • DN: 15–200
  • NPS: 1/2–8
    Suitable for small and medium-diameter pipelines across multiple industries.

4. Low Pressure Loss

The optimized internal design ensures minimal pressure drop, improving energy efficiency and reducing operational costs.

5. Reliable Backflow Protection

Automatic closing on flow reversal protects:

  • Pumps
  • Boilers
  • Heat exchangers
  • Piping systems
Model Design Feature Typical Application
RK 86 Standard wafer check valve Water & industrial fluids
RK 86A Enhanced sealing design Higher safety requirements
RKE 86 With damping function Reduced noise & vibration
RKE 86A Damping + advanced sealing Steam & condensate systems

This range allows engineers to select the optimal valve based on process conditions and system demands.

GESTRA RK 86 and RKE 86 series are widely used in:

  • Steam and condensate lines
  • Industrial water systems
  • Power plants
  • Chemical and petrochemical industries
  • HVAC and district heating systems
  • Process engineering plants

Their compact design makes them especially suitable for retrofits and space-limited installations.

Choosing GESTRA means investing in:

  • High operational safety
  • Long service life
  • Low maintenance requirements
  • Reduced system downtime
  • International standard compatibility (DIN & ASME)

These benefits translate into lower total cost of ownership and improved system reliability.

  • Valve Type: Non-Return (Check) Valve, Wafer Type
  • Installation: Sandwich between flanges
  • Models: RK 86, RK 86A, RKE 86, RKE 86A
  • Pressure Ratings: PN 10 / 16 / 25 / 40
  • ASME Classes: 125 / 150 / 300
  • Sizes: DN 15–200 / NPS 1/2–8
  • Media: Steam, condensate, water, industrial fluids
  • Manufacturer: GESTRA (Germany)

GESTRA has decades of experience in steam and fluid control technology. Their non-return valves are known for:

  • Precision manufacturing
  • Consistent quality
  • Proven performance in critical systems
  • Global acceptance in industrial standards

Q1: Can GESTRA RK 86 valves be installed in both DIN and ASME systems?
A: Yes, they are designed to fit DIN PN and ASME Class flanges.

Q2: What is the advantage of wafer-type non-return valves?
A: Compact size, lower weight, easier installation, and reduced pressure loss.

Q3: Are these valves suitable for steam applications?
A: Yes, especially RKE 86 and RKE 86A, which are optimized for steam and condensate systems.

Q4: What sizes are available?
A: From DN 15 to DN 200 and NPS 1/2 to 8.

To ensure performance and safety, always choose original GESTRA RK 86 / RKE 86 non-return valves from authorized distributors. You will receive:

  • Genuine products
  • Technical consultation
  • Fast delivery
  • Competitive pricing

👉 Contact us today for pricing and technical support.

For engineers and plant operators seeking a compact, efficient, and reliable non-return valve, GESTRA RK 86, RK 86A, RKE 86, and RKE 86A are the ideal choice.

With sandwich-type installation, wide pressure class compatibility, and proven German engineering, these valves deliver long-term performance in demanding industrial environments.

Choose GESTRA – engineered for reliability, safety, and efficiency.

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