Brass pressure regulator from our own production, close-up

Made by KRAISS & FRIZ

Pressure regulators

From our own workshop in Stuttgart — from the single cylinder to the ring main, in brass, and in aluminium for ammonia.

Made in Germany · in-house production

Our pressure regulators are made in our own workshop in Stuttgart — assembled by hand and tested piece by piece. We still manufacture spare parts and repair existing regulators twenty or thirty years after delivery.

Material and design

Brass body for standard gases
Aluminium body for ammonia
Single-stage design (two-stage versions are being phased out)
Various working pressures

Safe handling of gases matters to us — which is why we check every version for suitability for the gas you intend to use it with.

Our range

Four groups, from the gas cylinder to the fixed ring main. Every series is made in house — special versions, further gases and different connections on request.

No minimum order quantity.

Cylinder pressure regulators

Fitted directly to the gas cylinder. They reduce cylinder pressure of up to 200 bar to the working pressure — the largest group in our range.

R 10 brass pressure regulator with two gauges

R 10

The standard — single-stage, for almost every gas

Single-stage design for all gases except acetylene and propane. The oxygen version carries the German employers' liability insurance association test mark 1 BG 89. At 50 bar inlet and 8 bar outlet pressure it delivers 40 m³/h of nitrogen.

Inlet pressure: max. 200 bar
Outlet pressure: max. 10 bar
Design: single-stage

Show versions and article numbers (9)

Gas / version	Connection to DIN 477-1	Outlet to DIN 8542	Outlet pressure	Article no.
Oxygen	G 3/4" RH	G 1/4" RH	10 bar	501.010.101
Nitrogen*	W 24,32 × 1/14" RH	G 1/4" RH	10 bar	501.010.301
Compressed air*	G 5/8" RH, male	G 1/4" RH	10 bar	501.010.401
Carbon dioxide	W 21,8 × 1/4" RH	G 1/4" RH	4 bar	501.010.609
Hydrogen / methane*	W 21,8 × 1/4" LH	G 3/8" LH	10 bar	501.010.508
Ammonia, aluminium body	W 21,8 × 1/4" RH	G 1/4" RH	4 bar	501.010.809
Noble gases* (argon, helium) and CO₂	W 21,8 × 1/14" RH	G 1/4" RH	10 bar	501.010.901
Nitrous oxide (N₂O)	G 3/8" RH	G 1/4" RH	10 bar	501.011.501
Calibration gases (please state the composition)	M 19 × 1.5 LH	G 3/8" LH	10 bar	501.010.701

* available with 300 bar inlet pressure at extra cost

Enquire about R 10

R 10 pressure regulator for shielding gas with flow indicator

R 10 – special versions

Acetylene, shielding gas and flow metering

The R 10 series is available in several special versions: for acetylene with a yoke connection, for shielding gases with a flow indicator in l/min instead of a pressure gauge, and with a contents gauge and ball flow meter.

Inlet pressure: max. 200 bar*
Acetylene: up to 1.5 bar / max. 5 m³/h
Shielding gas: max. 35 l/min

Show versions and article numbers (4)

Gas / version	Outlet	Flow rate / pressure	Article no.
R 10 for acetylene (type approval 01 D DE 55172 EN 585)	G 3/8" LH with 9 mm hose tail	up to 1.5 bar	501.010.207
R 10 for shielding gas (e.g. ARKUF), reading in l/min	G 1/4" RH with 6 mm hose tail	max. 35 l/min	501.011.031
R 10 with contents gauge and ball flow meter (argon, ARKUF)	G 3/8" RH with 6 mm hose tail	max. 28 l/min	501.171.047
R 10 with contents gauge and ball flow meter, for forming gas	G 3/8" RH with 6 mm hose tail	max. 28 l/min	501.171.247

* available with 300 bar inlet pressure at extra cost

Enquire about R 10 – special versions

Two-stage pressure regulators

Constant outlet pressure, even as the cylinder empties

Two-stage design that keeps the outlet pressure largely independent of the inlet pressure. Worth having wherever the working pressure must stay stable over the whole cylinder contents.

Inlet pressure: max. 200 bar
Outlet pressure: max. 10 – 20 bar
Design: two-stage

Show versions and article numbers (5)

Gas / version	Inlet to DIN 477-1	Outlet	Outlet pressure	Article no.
Oxygen	R 3/4" RH	G 1/4" RH	max. 20 bar	803.030.000
Compressed air	R 5/8" RH	G 1/4" RH	max. 10 bar	803.030.001
Nitrogen	W 24,32 × 1/14" RH	G 1/4" RH	max. 10 bar	803.030.002
CO₂ / noble gases	W 21,8 × 1/14" RH	G 1/4" RH	max. 10 bar	803.030.003
Hydrogen	W 21,8 × 1/14" LH	G 3/8" LH	max. 10 bar	803.030.004

Enquire about Two-stage pressure regulators

RH 25 and RH 35

Higher flow rates up to 150 m³/h

For all non-aggressive gases except acetylene and propane. Considerably higher flow rate than the R 10 series: at 20 bar outlet pressure the RH 25 delivers 150 m³/h of nitrogen. Please state the gas when ordering.

Inlet pressure: up to 200 bar*
Outlet pressure: RH 25: up to 25 bar · RH 35: up to 35 bar
Flow rate: up to 150 m³/h

Show versions and article numbers (5)

Gas / version	RH 25 (up to 25 bar) / RH 35 (up to 35 bar)	Article no.
Noble gases / CO₂	RH 25 · RH 35	501.090.902 · 501.090.903
Compressed air	RH 25 · RH 35	501.090.402 · 501.090.426
Nitrogen	RH 25 · RH 35	501.090.302 · 501.090.303
Hydrogen / methane	RH 25 · RH 35	501.090.502 · 501.090.503
Oxygen (as RS 35)	RH 35 only	501.090.102

Inlet to DIN 477-1, outlet G 1/4" male, right-hand thread (left-hand for hydrogen / methane).
* available with 300 bar inlet pressure at extra cost (not for oxygen).

Enquire about RH 25 and RH 35

RH 165 pressure regulator for high outlet pressures

RH 100 and RH 165

For high outlet pressures up to 165 bar

For cases where the working pressure itself has to be very high. Available for all non-aggressive gases except oxygen, acetylene and propane. Further outlet pressures and outlets on request.

Inlet pressure: up to 200 bar*
Outlet pressure: RH 100: up to 100 bar · RH 165: up to 165 bar
Not for: Oxygen, acetylene, propane

Show versions and article numbers (4)

Gas / version	RH 100 (up to 100 bar) / RH 165 (up to 165 bar)	Article no.
Nitrogen	RH 100 · RH 165	501.090.304 · 501.090.305
Noble gases	RH 100 · RH 165	501.090.904 · 501.090.905
Compressed air	RH 100 · RH 165	501.090.404 · 501.090.405
Hydrogen	RH 100 · RH 165	501.090.504 · 501.090.505

Inlet to DIN 477-1, outlet G 3/8" male, right-hand thread (left-hand for hydrogen / methane).
* available with 300 bar inlet pressure at extra cost.

Enquire about RH 100 and RH 165

R 2000 series

Compact — for laboratory, school and fine metering

Compact design. The 3 bar version has a fine control valve on the outlet side for precise metering of the outlet pressure, which makes it particularly suitable for schools. Further versions cover high pressure at low flow.

Inlet pressure: max. 200 bar
Outlet pressure: 3, 16 or 60 bar
Flow rate: max. 1.5 m³/h at 2 bar

Show versions and article numbers (6)

Gas / version	Outlet	Outlet pressure	Article no.
R 2000 (3 bar) with fine control valve — noble gases / CO₂	G 1/8" male with 6 mm hose tail	max. 3 bar	501.824.015
R 2000 (3 bar) with fine control valve — nitrogen	G 1/8" male with 6 mm hose tail	max. 3 bar	501.820.315
R 2000 (3 bar) with fine control valve — hydrogen	G 1/8" male with 6 mm hose tail	max. 3 bar	501.820.515
R 2000 (3 bar) with fine control valve — oxygen	G 1/8" male with 6 mm hose tail	max. 3 bar	501.820.415
R 2000 (16 bar) — nitrogen	G 1/4" male	max. 16 bar	501.820.323
R 2000 (60 bar) — nitrogen	G 1/4" male	max. 60 bar	501.820.312

Inlet is a cylinder connection to DIN 477-1 in each case.
Further gases (except oxygen and toxic gases) and connections on request.

Enquire about R 2000 series

Special regulators for high flow rates

For applications that need a high flow rate very quickly — fire extinguishing systems, for example.

Type 1014

Up to 65 Nm³/min — for very high gas throughput

The large design for peak loads, for example in fire extinguishing systems. The 1014.25 version is made of solid brass and works with a metal bellows instead of an elastomer diaphragm — valve cone, pressure pin and bellows are positively coupled, so the force is transmitted directly. Mounting position is unrestricted.

Inlet pressure: max. 200 bar
Outlet pressure: 3 – 30 bar
Flow rate: up to 65 Nm³/min
Temperature: −30 to +60 °C

Show versions and article numbers (3)

Gas / version	Body style	Outlet pressure	Flow rate	Article no.	Data sheet
Type 1014.25	Metal bellows, approx. 5 kg	3 – 30 bar	up to 65 Nm³/min	configurable	PDF ↓
Type 1014.1	Rubber diaphragm	4 – 16 bar	up to 60 m³/min	on request	–
Type 1014.2	Spring bellows	4 – 22 bar	up to 60 m³/min	on request	–

Gases: nitrogen, noble gases, carbon dioxide, air. Materials of the 1014.25: brass body, NBR/PU seals, PA valve seat.
Options: outlet pressure gauge, safety valve, inlet filter, factory-set and sealed outlet pressure.
Certificates available per delivery lot: works certificate EN 10204 2.2, inspection certificate EN 10204 3.1. When enquiring, please state gas, outlet pressure and connections.

Enquire about Type 1014

Type 1011

Up to 11 Nm³/min — six body styles

High-performance regulator for high flow rates, in six versions: an angle body with side inlet and outlet inclined 54° downwards, or a straight through-flow body with inlet and outlet on one axis, for instance to be built into pipework. Each body style is available with 13 or 16 bar outlet pressure. Positively coupled diaphragm and valve cone unit with a reinforced diaphragm; on request factory-set and secured with a metal seal.

Inlet pressure: max. 200 bar
Outlet pressure: 13 or 16 bar
Flow rate: 10 – 11 Nm³/min
Temperature: −15 to +60 °C

Show versions and article numbers (6)

Gas / version	Body style	Outlet pressure	Flow rate	Article no.	Data sheet
Type 1011.1	Angle body, outlet inclined 54°	max. 13 bar	10 Nm³/min	configurable	PDF ↓
Type 1011.2	Angle body, outlet inclined 54°	max. 16 bar	11 Nm³/min	configurable	PDF ↓
Type 1011.3	Straight through-flow body	max. 13 bar	10 Nm³/min	configurable	PDF ↓
Type 1011.4	Straight, fixed connection G 3/8 female	max. 13 bar	10 Nm³/min	configurable	PDF ↓
Type 1011.5	Straight, fixed connection G 3/8 female	max. 16 bar	11 Nm³/min	configurable	PDF ↓
Type 1011.6	Straight through-flow body	max. 16 bar	11 Nm³/min	configurable	PDF ↓

Gases: nitrogen, noble gases, carbon dioxide, air. Safety valve set to 1.2 × outlet pressure.
Materials: brass body, SBR diaphragm, PTFE valve seat.
The article number is configured: 1011 . <version> . <inlet connection><outlet connection><gauge>. The possible combinations are listed in the respective data sheet — when enquiring, please state gas, outlet pressure and connections.
Certificates available per delivery lot: works certificate EN 10204 2.2, inspection certificate EN 10204 3.1. Special version with factory-set, sealed outlet pressure available.

Enquire about Type 1011

For pipework and compressor systems

The RN series does not sit on the cylinder but in the ring main — as an in-line regulator or as a wall-mounted tapping point.

RN 150 – tapping point

With inlet filter, optionally with flow meter

Tapping-point regulator for ring mains, with inlet filter and pressure indicator. Available as a factory-set and as an adjustable version. Alternatively with flow meter and metering valve for precise setting of the litres per minute.

Inlet pressure: max. 40 bar
Outlet pressure: 1.5 · 6 or 10 bar
Capacity: max. 25 m³/h (nitrogen)

Show versions and article numbers (8)

Gas / version	Measuring range	Version	Article no.
Oxygen**	–	with pressure gauge	501.410.101
Acetylene	–	with pressure gauge	501.410.207
Nitrogen, noble gases, CO₂	–	with pressure gauge	501.410.200
Argon	1 – 10 l/min	with flow meter	501.410.900
Argon	1 – 28 l/min	with flow meter	501.410.901
Nitrogen	1 – 12 l/min	with flow meter	501.410.300
Nitrogen	3 – 28 l/min	with flow meter	501.410.301
Helium	2 – 13 l/min	with flow meter	501.410.115

Inlet G 3/8" – G 3/8"L, outlet G 1/4" – G 3/8"L to DIN 8542.
Other gases and measuring ranges on request. Please state the measuring range when ordering.
** Pressure Equipment Directive, Art. 3 (3)

Enquire about RN 150 – tapping point

RN 151 – in-line regulator

In-line, G 1/2"

On request only: We do not manufacture this series for stock. Please talk to us before you plan with it — we will clarify availability and version.

In-line pressure regulator with pressure indicator and inlet filter for ring mains.

Inlet pressure: max. 40 bar
Outlet pressure: 10 bar, optionally 1.5 or 6 bar
Capacity: max. 25 m³/h (nitrogen)

Show versions and article numbers (3)

Gas / version	Article no.
Compressed air	501.430.301
Hydrogen / methane	501.430.508
Inert gases such as nitrogen, noble gases, CO₂	501.430.901

Inlet and outlet G 1/2". Other gases and measuring ranges on request.

Enquire about RN 151 – in-line regulator

Compact RN 153 in-line pressure regulator

RN 153 – compact in-line regulator

Very compact, G 1/4"

Very compact design for ring mains where space is tight.

Inlet pressure: max. 40 bar
Outlet pressure: 6 bar
Capacity: max. 5 m³/h (nitrogen)

Show versions and article numbers (4)

Gas / version	Article no.
Acetylene	501.450.207
Oxygen	501.450.114
Hydrogen / methane	501.450.514
Inert gases (e.g. nitrogen, noble gases, CO₂)	501.450.914

Inlet and outlet G 1/4". Further gases, connections and pressure ranges on request.

Enquire about RN 153 – compact in-line regulator

RN 155 tapping-point pressure regulator with wall bracket

RN 155 – tapping point with wall bracket

With gauge, ball valve and wall bracket

Tapping-point regulator with pressure gauge, ball valve and wall bracket — the complete, ready-to-mount tapping point. Alternatively with flow meter, metering valve and pilot valve.

Inlet pressure: max. 40 bar
Outlet pressure: adjustable up to 10 bar
Capacity: max. 25 m³/h (nitrogen)

Show versions and article numbers (9)

Gas / version	Measuring range	Version	Article no.
Oxygen	–	with ball valve	501.480.101
Acetylene	–	with ball valve	501.480.207
Nitrogen / noble gases / CO₂	–	with ball valve	501.480.901
Hydrogen / methane	–	with ball valve	501.480.508
Argon	1 – 10 l/min	with flow meter	501.490.900
Argon	1 – 28 l/min	with flow meter	501.490.901
Nitrogen	1 – 12 l/min	with flow meter	501.490.300
Nitrogen	3 – 28 l/min	with flow meter	501.490.301
Helium	2 – 13 l/min	with flow meter	501.490.910

Inlet G 3/8" right-hand thread, left-hand for flammable gases. Optionally 1.5 or 6 bar (1.5 bar for acetylene), also factory-set.
Connections to DIN 8542. Further connections on request.

Enquire about RN 155 – tapping point with wall bracket

Range for live fish transport

A specialist range from our own production: oxygen supply for fish transport units and holding tanks.

R 10F pressure regulator for live fish transport

R 10F and KUF accessories

Oxygen for fish transport units

The R 10F supplies fish transport units with oxygen. The matching KUF fine-control shut-off valve is available in two to six-way versions — for several tanks from one cylinder.

Inlet pressure: max. 200 bar
Outlet pressure: max. 10 bar
Gas: Oxygen

Show versions and article numbers (6)

Gas / version	Inlet	Outlet	Article no.
R 10F pressure regulator for oxygen	G 3/4" RH to DIN 477-1 no. 9	G 1/2" male, RH	501.010.103
KUF fine-control shut-off valve, 2-way	G 1/2" RH, union nut	G 1/4" male with Ø 6 mm hose tail	602.020.100
KUF fine-control shut-off valve, 3-way	G 1/2" RH, union nut	G 1/4" male with Ø 6 mm hose tail	602.030.100
KUF fine-control shut-off valve, 4-way	G 1/2" RH, union nut	G 1/4" male with Ø 6 mm hose tail	602.040.100
KUF fine-control shut-off valve, 6-way	G 1/2" RH, union nut	G 1/4" male with Ø 6 mm hose tail	602.060.100
Oxygen manifold (carbon body, stainless steel connections)	–	approx. 40 l/h at 0.2 bar, 350 × 35/22 mm	607.030.100

The range also includes the KUF air diffuser in various lengths and water/air outlet nozzles from 0.5 to 3.0 mm — please enquire.

Enquire about R 10F and KUF accessories

Technical data and article numbers as per our catalogue “Schweiß- und Schneidtechnik”. Subject to change and to error — when enquiring or ordering, please always state the gas, the outlet pressure you need and the connections. Further gases, measuring ranges and connections are made on request. The technical data sheets linked above are published in German; we are happy to explain any figure in English.

Maintenance, testing, repair

Pressure regulators are safety-relevant components. We service, test and repair every model we have made — decades after delivery as well. Spare parts stay available long term and repairs are carried out in our own workshop.

Service and maintenance

A KRAISS & FRIZ employee testing a brass pressure regulator on the workshop test bench — Every regulator goes across the test bench — tightness and function are checked by hand.