GESTRA Non-Return Valve RK 41 | PN 6/10/16 Wafer Check Valve

GESTRA Non-Return Valve RK 41 | PN 6/10/16 Wafer Check Valve
GESTRA Non-Return Valve RK 41 | PN 6/10/16 Wafer Check Valve
GESTRA Non-Return Valve RK 41 | PN 6/10/16 Wafer Check Valve

GESTRA Non-Return Valve RK 41 | PN 6/10/16 Wafer Check Valve

RK non-return valves are used to prevent the return flow of fluid in pipes. Wafer-type non-return (check) valves for sandwich- ing between flanges, designed with spring for installation in any position. Without spring only for vertical pipes with upward flow. Centring ring or self-centring valve body. Suitable for liquid, gas and steam. Please note the classification according to the Pressure Equipment Directive (PED).

 

RK 41

  

T [°C]

 DIN/EN, PN 16 Design
– 10 120 150 180 200 250 300
DN 15 – 100 (½ – 4″) p [barg] 16.0 16.0 16.0 16.0 13.5 Metal-to-metal (standard)
DN 125 – 200 (5 – 8″) p [barg] 16.0 16.0 14.4 13.4 12.8 11.2 9.6 Metal-to-metal (standard)
Valve disc/cone tmin [°C] tmax [°C] Application Leakage rate
Metal-to-metal RK 41,

DN 15-100 (½-4”)

 – 200 200 Liquid, gas, steam EN 12266-1, P12, leakage rate D
Metal-to-metal RK 41,

DN 125-200 (5-8”)

 – 10 300 Liquid, gas, steam EN 12266-1, P12, leakage rate D
EPDM – 40 150 Water, condensate, steam EN 12266-1, P12, leakage rate A
FPM – 25 200 Non-hazardous gas, air EN 12266-1, P12, leakage rate A
Standard valves for fitting between flanges to
EN BS ASME
DIN EN 1092, form B 1, PN 6/10/16 BS 10 Table D, E, F ASME B 16.1 Class 125 FF

ASME B 16.5 Class 150 RF1)

1) ASME Class 150 RF only suitable for DN 125 – 200 (5 – 8”).

Nominal size [mm] 15 20 25 32 40 50 65 80 100 125 150 200
[inch] ½ ¾ 1 1¼ 1½ 2 2½ 3 4 5 6 8
Dimensions L2) 16 19 22 28 31.5 40 46 50 60 90 106 140
[mm] D 40 47 56 72 82 95 115 132 152 184 209 264
Weight [kg] 0.1 0.14 0.22 0.5 0.66 1.1 1.45 2.3 3.5 6.8 10 20

2) Short overall length to DIN EN 558, series 49 (; DIN 3202-3, series K4)

DN 15 – 100 (½ – 4”) DIN/EN ASTM/ASME equivalent Category
Body, seat and guide ribs CW 617N Brass
Valve disc, spring retainer 1.4571 A182 F 316 Austenitic stainless steels
Spring 1.4571 A313 Type 316 Austenitic stainless steels
Spiral centring ring 1.4310 A 313 Type 302 Austenitic stainless steels
DN 125 – 200 (5 – 8”) DIN/EN ASTM equivalent Category
Body 5.1301 A126 Class A Grey cast iron
Valve cone 1.4006 A 182 Class B Chromium steel
Guide 1.4107 B 584 C90 500 Chromium steel
Spring 1.4571 A313 Type 316 Austenitic stainless steels

GESTRA Non-Return Valve RK 41 | PN 6/10/16 Wafer Check Valve

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

Reliable Non-Return Valve for Sandwiching Between Flanges PN 6 / 10 / 16 and ASME Class 125

The GESTRA Non-Return Valve RK 41 is a robust and high-efficiency wafer-type check valve designed for sandwich installation between flanges. Engineered for industrial reliability, this valve supports PN 6, PN 10, PN 16, and ASME Class 125 pressure classes, making it a versatile solution for a wide range of piping systems.

Available in sizes DN 15–200 and NPS ½–8, the GESTRA RK 41 non-return valve provides dependable backflow prevention, system protection, and long service life in demanding industrial environments.

GESTRA is a globally trusted manufacturer of premium valves and steam system solutions. The RK 41 non-return valve is engineered with German precision to ensure optimal performance, durability, and operational safety.

Key Benefits:

  • Reliable prevention of reverse flow
  • Compact wafer design for space-saving installation
  • Suitable for multiple pressure ratings
  • Low pressure loss and fast response
  • Minimal maintenance requirements
Specification Details
Product Type Non-Return Valve / Check Valve
Model RK 41
Installation Sandwiching between flanges (Wafer type)
Pressure Ratings PN 6 / PN 10 / PN 16
ASME Rating Class 125
Nominal Diameter DN 15–200
Pipe Size NPS ½–8
Application Industrial piping systems
Manufacturer GESTRA

The GESTRA RK 41 wafer check valve is optimized for flanged piping installations, offering easy mounting between standard flanges without additional space requirements. Its sandwich design reduces weight and simplifies installation while maintaining excellent sealing performance.

Typical Applications:

  • Steam and condensate systems
  • Water supply and treatment plants
  • Heating and cooling systems
  • Oil and gas installations
  • Chemical and process engineering industries

The GESTRA RK 41 non-return valve is designed to operate across PN 6, PN 10, PN 16, and ASME Class 125, making it suitable for both metric and imperial piping systems.

With sizes ranging from DN 15 to DN 200 and NPS ½ to 8, this valve supports small-scale installations as well as large industrial pipelines.

Thanks to its durable construction and proven valve design, the GESTRA RK 41 check valve ensures:

  • Consistent sealing performance
  • Reduced wear and tear
  • Protection of pumps, boilers, and process equipment
  • Lower total cost of ownership

Choosing an original GESTRA Non-Return Valve RK 41 guarantees:

  • Authentic German manufacturing quality
  • Compliance with international pressure standards
  • Stable performance under industrial conditions
  • Long-term operational safety
  • Manufacturer-backed reliability

If you need a high-quality non-return valve for sandwiching between flanges, the GESTRA RK 41 is the ideal solution. Its compact wafer design, wide pressure compatibility, and trusted brand reputation make it one of the best check valves for industrial applications.

Contact us now for technical support, pricing, and availability of GESTRA Non-Return Valve RK 41 PN 6/10/16 – ASME Class 125, DN 15–200, NPS ½–8.

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