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

Description

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).

Pressure & temperature ratings

RK 41	T [°C]	DIN/EN, PN 16							Design
RK 41	T [°C]	– 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 seats

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

End connection

Standard valves for fitting between flanges to

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”).

Dimensions

Nominal size	[mm]	15	20	25	32	40	50	65	80	100	125	150	200
Nominal size	[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)

Materials

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

GESTRA Non-Return Valve RK 41 – High-Performance Wafer Check Valve for Flanged Piping 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.

Why Choose GESTRA Non-Return Valve RK 41?

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

Technical Specifications – GESTRA RK 41

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

Designed for Flanged Industrial Pipe Systems

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

Wide Pressure and Size Range for Maximum Flexibility

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.

High Reliability and Long Service Life

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

Why Buy Original GESTRA RK 41 Non-Return Valve?

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

Order GESTRA Non-Return Valve RK 41 Today

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.