4126A SERIES™

The 4126A Series™ internal gear pump is the most versatile line of internal gear pumps due to the availability of many design and other options. It can handle a broad range of viscosities with constant flow rate up to 500 GPM (114 m³/h).

Features & Benefits

Positive displacement internal gear pumping principle handles a broad range of viscosities with constant flow rate
Axial rotor thrust is controlled by double row ball bearing or tapered roller bearings; a bushing provides a secondary point of radial shaft support
Rotatable bearing housing provides easy rotor end clearance adjustment for viscosity or to compensate wear

Downloads

Performance

Videos

Liquids

Downloads

Capacity

to 500 GPM
to 114 m³/h

Viscosity

28 to 2,000,000 SSU
1 to 440,000 cSt

Pressure

to 200 PSI
to 14 Bar

Temperature

-60 to +650 °F
-50 to +345 °C

Options

Porting

Right Angle (90°)

Opposite (180°) (Rotatable Casing)

NPT

Flanged

Drives

D Direct-Mounted Drive

P Purchased Gear Reducer Drive

R Offset Gear Reducer Drive

V Drive | V-Belt Drive

Mounting

Foot Mount

Sealing

Mechanical Seal

Specifications

Specifications
Model	Standard Port Size	Nominal Pump Rating (GPM)	Nominal Pump Rating (m3/h)	Maximum RPM	Maximum Pressure PSI	Maximum Pressure BAR
H4126A	1.5	15	2.8	1750	200	14
HL4126A	1.5	30	5.6	1750	200	14
K4126A	2	80	18	780	200	14
KK4126A	2	100	23	780	200	14
L4126A	2	135	31	640	200	14
LQ4126A	2.5	135	31	640	200	14
LL4126A	3	140	32	520	200	14
LS4126A	3	200	45	640	200	14
Q4126A	4	300	68	520	200	14
QS4126A	6	500	114	520	200	14

Select model for more detailed information:

HL4126A , KK4126A , L4126A , LL4126A , LQ4126A , LS4126A , Q4126A , QS4126A

Obsolete Models: H4123-N

Videos

Refined Fuels

Refined fuels would include petroleum based fuel oils and some Jet Fuels. Their viscosity and temperature handled can vary greatly. Normally these are handled in bulk transfer operations.

4195

Cast iron
Pressures up to 250 PSI
Capacities to 580 GPM

Ductile Iron
Pressures >200 PSI
Capacities to 190 GPM

475

Cast Iron
Compact installation
Pressure up to 100 PSI
Capacities to 30 GPM

Biofuels

Biofuels include Biodiesel and Ethanol. These are fuels made from renewable resources and typically blended with refined fuels as additives.

4124C

Cast iron
High temperature & abrasive resistant options
Diverse selection of port sizes & ratings with ProPort™ Casing
Capacities to 500 GPM

4127C

316 Stainless Steel
High temperature & abrasive resistant options
Diverse selection of port sizes & ratings with ProPort™ Casing
Capacities to 320 GPM

Ductile Iron
Compact Installation
Capacities to 190 GPM

Glycol (Ethylene Glycol, Ethylene Alcohol)

A clear, colorless, syrupy liquid used in a variety of applications involving lacquers, resins, printing inks, adhesives, waxes, and pharmaceuticals. It is often blended with water and used as a coolant and anti-freezing agent.

4124C

Cast iron
Seal flexibility
Capacities to 500 GPM

4127C

316 Stainless Steel
Seal flexibility
Capacities to 320 GPM

TSM / Catalog / Flyers / Brochures

Service Manual | 1600

Download

Technical Service Manuals

Catalog Section | 1601 | Non-Jacketed

Download

Catalog Sections

Form 5000 | Product Catalog

Download

REPAIR RESOURCES

Exploded Diagram for Series 123A/4123A - 124A/ 4124A - 126A/4126A - 127A/4127A …
Quick Tip #01 - Setting End Clearance on a Viking Pump Universal Seal Pump
How to Use a Thrust Bearing Locknut Tool
Viking Pump Universal Seal Series with Stuffing Box Component Seals Repair Kit Installation
Quick Tip #02 - Install Mechanical Seal into Stuffing Box in Viking Pump Universal Seal Pump

DRAWINGS


H-HL with Plain Head - 1.5" NPT RH/LH	PDF	STEP

H-HL with Relief Valve - 1.5" NPT RH/LH	PDF	STEP

K-KK with Plain Head - 2" Class 150 RH/LH	PDF

K-KK with Plain Head - 2" NPT RH/LH	PDF	STEP

K-KK with Relief Valve - 2" Class 150 RH/LH	PDF	STEP

K-KK with Relief Valve - 2" NPT RH/LH	PDF	STEP

L with Plain Head - 2" NPT RH	PDF	STEP

L with Relief Valve - 2" NPT RH	PDF	STEP

LL with Plain Head - 3" Class 125 ANSI RH/LH	PDF	STEP

LL with Relief Valve - 3" Class 125 ANSI RH	PDF	STEP

LQ with Plain Head - 2.5" Class 125 ANSI RH/LH	PDF	STEP

LQ with Relief Valve - 2.5" Class 125 ANSI RH/LH	PDF	STEP

LS with Plain Head - 3" Class 125 ANSI RH/LH	PDF	STEP

LS with Relief Valve - 3" Class 125 ANSI RH	PDF	STEP

Q with Relief Valve - 4" Class 150 ANSI RH/LH with Studs and Bolts	PDF	STEP

QS with Plain Head - 4" Class 125 ANSI RH/LH	PDF	STEP

QS with Plain Head - 6" Class 125 ANSI Opposite	PDF	STEP

QS with Relief Valve - 6" Class 150 ANSI Opposite	PDF	STEP

QS with Relief Valve - 6" Class 150 ANSI RH	PDF	STEP

Industrial

Energy

Hygienic