Aftermarket VSKV-KR Dual-Line Metering Valve
This page describes an aftermarket dual-line lubricant metering valve that cross-references the SKF VS series VSKV-KR. SKF is a trademark of its respective owner. This is an aftermarket metering valve, not manufactured, sponsored, or endorsed by SKF. VSKV-KR designations are for cross-reference identification only.
Built for centralized grease and oil systems operating up to 400 bar, this valve meters an individually adjustable volume to each lubrication point on every half-cycle. The vertical main line ports suit installations where supply lines run up from below, and the integrated indicator pin gives visual confirmation of piston movement during commissioning and troubleshooting.
Reading the Designation Code
VSK indicates a VS series dual-line metering valve in a compact block design. The first V stands for vertical main line port orientation, meaning the main line ports are located at the base and supply lines run up from below. K identifies the integrated visual indicator pin for cycle confirmation. The final R marks infinitely variable output adjustment from 0 to 1.5 cm3 per stroke. For side-approaching supply lines, the VSKH-KR horizontal variant exists as an alternative.
KR and KRR Adjustment Ranges
The KR standard range delivers 0 to 1.5 cm3 per stroke, fully infinitely adjustable to match each bearing or friction point. The KRR reduced range meters 0 to 0.6 cm3 per stroke and is specified with the KRR suffix for points needing small doses. In both ranges the indicator pin shows piston movement each half cycle, which simplifies commissioning and troubleshooting across the whole lubrication system.
Specifications
| Min operating pressure | 35 bar (508 psi) |
| Max operating pressure | 400 bar (5,800 psi) |
| Output per outlet per stroke | 0 to 1.5 cm3 adjustable (KRR 0 to 0.6) |
| Outlet configurations | 1 to 8 |
| Main line inlet thread | G 1/4 |
| Outlet thread | G 1/4 |
| Operating temperature | -20 to +80 C standard seal, up to +120 C high-temp seal version |
| Lubricants | oil from 20 cSt, grease NLGI 0 to 3 |
| Material | galvanized carbon steel standard, stainless steel optional |
Dual-Line Cycle
A dual-line system works in alternating half cycles. Line A is pressurized while line B is vented, so the pistons shift and dose the set volume at each outlet. Then the lines swap and the same action repeats in the opposite direction. Each outlet meters on every half cycle, giving continuous cyclic lubrication as long as the system runs. A blockage anywhere in a line stops the cycle for detection, which protects the connected points from missed lubrication events. See the full operating principle on the dual-line lubrication systems page.
What to Confirm Before Ordering
Confirm port orientation first: VSKV vertical base ports suit supply lines rising from below, while VSKH side ports are used where lines approach horizontally. Confirm the adjustment range, KR standard or KRR reduced, because it changes the metered output band. Confirm outlet count from 1 to 8 to match the number of points served by the block. Confirm seal version for temperature: standard covers -20 to +80 C, while the high-temp seal version extends to +120 C. Confirm the lubricant type, oil from 20 cSt or grease NLGI 0 to 3, so the valve internals are compatible with the system charge. The two-outlet adjustable version is covered on the VSKV2 valve page. If the configuration is uncertain, contact the team with your line layout and point count before ordering.
Frequently Asked Questions
What does KR mean in the VSKV-KR designation?
KR means the valve has infinitely adjustable output with an integrated indicator pin. The adjustment range is 0 to 1.5 cm3 per stroke.
What is the difference between KR and KRR adjustment?
KR covers 0 to 1.5 cm3 per stroke, while KRR covers a reduced 0 to 0.6 cm3. KRR is used when points need smaller metered doses.
How does VSKV compare to VSKH?
VSKV has vertical base main line ports, so supply lines run up from below. VSKH has side ports for supply lines approaching horizontally.
How many outlets can this valve have?
The valve is available with 1 to 8 outlets. Each outlet meters its own adjustable volume every half cycle.
What is the operating pressure range?
The minimum operating pressure is 35 bar and the maximum operating pressure is 400 bar. The system must stay within this band.
Can I adjust the output after installation?
Yes, that is the point of the KR range. Adjustment is possible after installation, and the indicator pin confirms piston movement.
Is grease NLGI 3 acceptable in this valve?
Yes, grease from NLGI 0 to NLGI 3 is acceptable. Oil from 20 cSt can also be metered.
What thread sizes are on the main line and outlets?
The main line inlet thread is G 1/4. The outlet thread is also G 1/4.
How do I know the valve is cycling correctly?
The integrated indicator pin moves each half cycle when the valve doses. That movement confirms the piston is shifting and metering.
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 range and outlet count.
