Valve Grinding Machine TVG90
The TVG90 is a horizontal valve refacer for engine overhaul work, covering valve stems from 4 mm to 14 mm and valve heads up to 90 mm, with valve lengths from 70 to 290 mm. Valve rotation is horizontal through the fire face and the speed is variable from 0 to 750 r.p.m., set according to valve head diameter, which is w...
What This Machine Does
The TVG90 is a horizontal valve refacer for engine overhaul work, covering valve stems from 4 mm to 14 mm and valve heads up to 90 mm, with valve lengths from 70 to 290 mm. Valve rotation is horizontal through the fire face and the speed is variable from 0 to 750 r.p.m., set according to valve head diameter, which is what keeps surface speed sensible on a large head instead of burning the face. Seat angles from 12 to 47 degrees are covered, with an angle grinding range of 10 to 54 degrees, so the machine handles both car and heavier engine valve geometry. The 200 mm main grinding wheel is 15 mm wide, balanced and driven by a motorspindle, and a wheel dresser is built into the machine so the wheel can be trued without taking it off. A stem end grinding attachment is included for tidying the valve tip in the same setup.
Why Buyers Choose This Machine
- Valve heads up to 90 mm and stems from 4 to 14 mm cover car through heavier engine valves
- Valve rotation speed adjustable from 0 to 750 r.p.m. according to head diameter so surface speed stays controlled
- Angle grinding range of 10 to 54 degrees covers seat angles from 12 to 47 degrees
- Balanced 15 mm wide grinding wheel driven by a motorspindle for a steady cut
- Built-in wheel dresser trues the wheel without removing it from the machine
- Stem end grinding attachment handles the valve tip in the same setup
- Valve lengths from 70 to 290 mm accepted so long commercial valves fit
Where Valve Grinding Machine TVG90 Earns Its Place
Problems It Solves
- A pitted or worn valve face will not seal against a newly cut seat
- Grinding a large valve head at a small valve's speed burns the face
- Machines with a narrow angle range cannot handle engines with unusual seat angles
- A glazed grinding wheel has to be removed and dressed off the machine unless a dresser is built in
- Worn valve stem ends upset valve clearance if they are not ground back
- Long commercial-engine valves do not fit refacers built for car work
Who It Is For
- Cylinder head reconditioning shops
- Engine overhaul workshops handling car and commercial engines
- Truck bus and agricultural machinery service shops
- Distributors equipping head reconditioning lines in export markets
Application Scenarios
- Refacing valves during a full cylinder head overhaul
- Grinding large-head valves up to 90 mm on commercial engines
- Setting non-standard seat angles within the 10 to 54 degree range
- Dressing worn valve stem ends before reassembly
- Batch valve work in a head reconditioning line
Technical Detail
Technical Features
- Horizontal valve rotation through the fire face
- Valve rotation speed 0 to 750 r.p.m. set by valve head diameter
- Valve stem capacity 4 to 14 mm
- Valve head capacity up to 90 mm
- Valve seat angles 12 to 47 degrees with 10 to 54 degree angle grinding range
- 200 mm main grinding wheel 15 mm wide balanced and motorspindle driven
- Built-in grinding wheel dresser
- Stem end grinding attachment
Specifications
| Machine type | Horizontal valve refacing machine |
|---|---|
| Models | TVG90 |
| Valve stem diameter | 4 to 14 mm (0.16 to 0.55 in) |
| Valve head diameter | 12 to 90 mm (0.47 to 3.54 in) |
| Valve length | 70 to 290 mm (2.76 to 11.42 in) |
| Angle grinding range | 10 to 54 degrees |
| Valve seat angles | 12 to 47 degrees |
| Valve rotation speed | 0 to 750 r.p.m. |
| Main wheel diameter | 200 mm (7.87 in) |
| Grinding wheel width | 15 mm |
| Lead time | Shipped in 45 days after payment |
| Shipping port | Shanghai or Tianjin |
Figures above are taken from the product information we hold. Send us your application and we will confirm the exact specification for the model quoted.
How It Is Built and What Can Be Changed
Operations Performed
- Valve face grinding
- Stem end grinding
- Wheel dressing
Quality Control
- Ground valve face run-out checked against the stem axis on a test valve
- Grinding angle setting verified across the 10 to 54 degree range
- Wheel balance and motorspindle run-out checked on assembly
- Valve rotation speed checked across the 0 to 750 r.p.m. range
- Machine run in and a sample valve refaced before packing
Customisation Options
- Grinding wheel grade selected for the valve materials you work with
- Chuck and workholding specified for your stem range within 4 to 14 mm
- Supply voltage and frequency set for your market
- Stem end grinding attachment and spare wheels quoted with the machine
- Manual prepared in your working language
How It Compares With the Alternatives
| Valve grinder TVR100 | The TVR100 leads on chuck handling and includes rocker arm grinding; the TVG90 gives the wider valve geometry range with heads to 90 mm and 10 to 54 degree angle grinding |
|---|---|
| Valve grinder VR90 | The VR90 is the compact repair-shop machine; the TVG90 adds a built-in wheel dresser a motorspindle-driven balanced wheel and speed set by head diameter |
| Hand lapping valves | Lapping only blends the existing face; the TVG90 grinds a new face at a defined angle, which is what a worn or pitted valve actually needs |
Running the Machine
Step 1
Check the valve stem for wear and bend before loading it in the chuck
Step 2
Set the valve rotation speed according to the valve head diameter up to 750 r.p.m.
Step 3
Set the grinding angle within the 10 to 54 degree range for the seat angle you are matching
Step 4
Dress the wheel with the built-in dresser before starting a batch
Step 5
Take light passes until the face cleans up across its full width
Step 6
Fit the stem end attachment where the valve tip also needs grinding
Step 7
Check margin thickness and stem length before returning the valve to the head
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Questions About Valve Grinding Machine TVG90
What valve sizes does the TVG90 take?
Valve stems 4 to 14 mm, valve heads 12 to 90 mm and valve lengths 70 to 290 mm. Send us your largest valve and we will confirm it fits.
What seat angles can it grind?
Valve seat angles from 12 to 47 degrees, with an overall angle grinding range of 10 to 54 degrees.
Do I need a separate dresser for the wheel?
No. A grinding wheel dresser is built into the machine, so the wheel is trued in place.
Can it grind the valve stem end?
Yes. A stem end grinding attachment is part of the machine, so the tip is ground in the same setup.
What is the lead time?
Shipped in 45 days after payment, from Shanghai or Tianjin.
What are your payment and trade terms?
FOB CFR and CIF. Payment is 30 percent by T/T on order and 70 percent before shipment, or an irrevocable L/C at sight.
What spare parts should I order?
Grinding wheels are the main consumable; the main wheel is 200 mm diameter and 15 mm wide. Tell us your monthly valve volume and we will suggest quantities.
Request a Quote on the Valve Grinding Machine TVG90
Send us the work you need it to do, the voltage on your site and the port you ship to. We will come back with the model, the tooling and the lead time.