Aftermarket VSG-KR Dual-Line Metering Valve
This page describes an aftermarket dual-line lubricant metering valve that cross-references the SKF VS series VSG-KR. SKF is a trademark of its respective owner. This is an aftermarket metering valve, not manufactured, sponsored, or endorsed by SKF. VSG-KR designations are for cross-reference identification only. The valve connects to the two main supply lines of a dual-line system and meters an individually adjustable volume to each point on every half-cycle of the reversing valve.
The G3/8 Advantage
The VSG uses a G3/8 main line inlet versus the G1/4 inlet of the VSKV and VSKH series. The larger bore supports higher flow. The VSG suits systems with higher total lubricant demand, longer main line runs, or larger point counts where a G1/4 inlet would create excessive pressure drop. Outlet connections are G1/4 on all models.
VSG Versus VSK Comparison
| Feature | VSG-KR | VSK |
| Main line inlet | G3/8 | G1/4 |
| Outlet | G1/4 | G1/4 |
| Adjustment | 0.14 ml per turn | Stepless |
| Pressure | 35-400 bar | 35-400 bar |
| Outlets | 2, 4, 6, 8 | 1-8 |
| Best for | Higher-flow and long runs | Standard installations |
Compare related pages: VSKV2 valve page and VSKV-KR valve page.
Metering Screws and Adjustment
Output is adjusted via interchangeable metering screws. The standard D-type screw has a maximum of 1.5 cm3 per stroke. Special screws can deliver up to 2.2 cm3 per stroke. The adjustment increment is 0.14 ml per turn of the metering screw. The screw selection sets the range and the turns fine-tune the dose.
Specifications
| Min operating pressure | 35 bar (508 psi) |
| Max operating pressure | 400 bar (5,800 psi) |
| Output per outlet | Standard max 1.5 cm3 per stroke, special to 2.2 |
| Adjustment | 0.14 ml per turn |
| Outlets | 2, 4, 6, or 8 |
| Main line inlet | G3/8 BSPP or 3/8 inch NPT |
| Outlet | G1/4 BSPP or 1/4 inch NPT |
| Operating temperature | -20 to +80 C standard seal, up to +120 C high-temp seal version |
| Lubricants | NLGI 0-2 grease, oil 68 cSt and above |
| Body | Galvanized carbon steel standard, stainless steel or chemically nickel-plated options |
| Max outlet back pressure | 30 bar |
| Mounting | Any orientation |
What to Confirm Before Ordering
Confirm the inlet size G3/8 matches your main lines, because the VSG is not a direct swap for G1/4 VSK bodies. Confirm the outlet count of 2, 4, 6, or 8. Confirm the metering screw type for your dose. Confirm the seal version for temperature. Confirm the lubricant grade. If you need help checking these points, contact the team.
Frequently Asked Questions
What is the difference between VSG and VSK valves?
The VSG has a G3/8 inlet while the VSK has a G1/4 inlet. The larger inlet supports higher flow for long runs.
How many outlets does the VSG-KR have?
The valve is available with 2, 4, 6, or 8 outlets. You choose the outlet count for your system.
How is output set on the VSG-KR?
Output is set by metering screw selection plus fine adjustment. Each turn of the screw changes output by 0.14 ml.
What is the maximum output per stroke?
Standard screws deliver a maximum of 1.5 cm3 per stroke. Special screws can deliver up to 2.2 cm3 per stroke.
What pressure range does the VSG-KR support?
The operating pressure range is 35 to 400 bar. Minimum is 35 bar and maximum is 400 bar.
What lubricants can the VSG-KR meter?
The valve meters NLGI 0-2 grease and oil at 68 cSt and above. Confirm your lubricant grade before ordering.
What materials are used for the valve body?
Galvanized carbon steel is the standard body material. Stainless steel or chemically nickel-plated options are available.
What is the maximum outlet back pressure?
The maximum outlet back pressure is 30 bar. Higher back pressure can affect metering accuracy and valve function.
Can the VSG-KR replace my existing VSK valve?
Not directly, because the G3/8 inlet differs from the G1/4 inlet on VSK bodies. Check your main line size first.
Who builds this valve, and how do I get a quotation?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
Contact the team with your outlet count and screw type.
