Materials:

Body, cover	TOV-12: Cast iron TOV-22, 25: Cast Steel
Trim	Cast Bronze, Stainless Steel
Disc	NBR
Disc holder	Steel
Spring	Stainless Steel

Technical Description:

- Three functions in one: Non-slam check valve, shut-off valve, and balancing valve   

+ Installation[material and labor] cost saving   

+ Space saving   

+ Reduction in weight 

- Spring loaded disc: Prevents water hammer 

- Valve opening adjustment: Enables the control of pump discharge flow rate

- Position indicator: Easy checking of valve opening

- NBR disc: Guarantees tight shut-off and reduces the impact of closure 

- Stainless steel spring: Resistant to corrosion 

- Built-in by-pass valve: Convenient for drainage 

- Vertical or horizontal installation: Suitable for any site conditions

- Streamlined flow passage: Low head loss