R19 Series flowmeter-type pressure regulator

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R19 Series flowmeter-type pressure regulator

The R19 cleverly integrates pressure reduction and flow metering, making it a convenient tool designed for MIG/TIG gas shielded welding and industrial laboratories. Its core feature is a transparent flow tube made of impact-resistant composite material, which clearly displays liters per minute (LPM), providing operators with a clear overview of gas consumption. The pressure regulator is preset at a safe 0.35 MPa, and the body is forged and electroplated from high-quality brass, effectively handling spatter and sparks in the welding environment. This integrated design simplifies gas connection and reduces the risk of leakage.

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Model Number

Gas Service

Outlet Flowmeter

Inlet gauge(MPa)

Inlet Connection

Outlet connection

R19C-25L

CO₂

0-25LPMCO₂

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19A-25L

Ar

0-25LPM ARGON

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19HE-80L

He

0-80LPM HELIUM

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19A-50L

Ar

0-50LPM ARGON

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19HE-160L

He

0-160LPM HELIUM

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19N-30L

N₂

0-30LPM NITROGEN

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19Q-30L

AIR

0-30LPM AIR

25 

G5/8"-RH(F)

M16-1.5RH(M)

R19H-100L

H₂

0-100LPM HYDROGEN

25 

W21.8-14LH(M)

M16-1.5RH(M)

About Us
Ningbo Keshengli Stainless Steel Valve Co., Ltd.
Ningbo Keshengli Stainless Steel Valve Co., Ltd.

Our company specializes in the manufacturing and sales of stainless steel pipe fittings and valves in national (GB), American (ANSI/ASME), and British (BS) standards. We are equipped with advanced CNC machining centers, material testing and heat treatment facilities, a skilled technical team, and a robust production workforce. With a sound quality management system and excellent after-sales service, we sincerely serve customers worldwide.

Our main products include: ferrule-type fittings, threaded fittings, instrument fittings, instrument needle valves, instrument ball valves, ferrule needle valves, ferrule ball valves, compact high-pressure instrument needle valves, compact high-pressure instrument ball valves, and high-pressure check valves. The primary material is SS316 stainless steel. These products are widely used in petrochemical, petroleum, electric power, pharmaceutical, food, papermaking, marine, and general machinery industries.

We strictly control product quality at every stage and are committed to delivering superior quality through advanced technology and professional management. Adhering to the business philosophy of "Quality First, Customer Supreme, Integrity Foremost," we strive to build the "NB-KSL" brand image, better serve our customers, and work together with you to create a prosperous future.

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  • NB-KSL® fittings are supplied assembled and finger tight. Disassembly before use can allow the entry of dirt or other particles.

  • The NB-KSL® tube fitting is a mechanism used both to seal and to grip tubing. The mechanical advantage and geometry of this type of fitting produce a leak-tight assembly. To assemble, simply insert th...

  • NB-KSL® has produced high quality tube and pipe fittings in various materials for high-pressure applications since its establishment in 2007. As a result of tremendous efforts in research and developm...