STK-5B / STK-6B

The ST-1600 compliments the ST-90 and STG-900 ST Rotors by adding long-range capabilities. These enhanced radius rotors are perfect for football fields, where smaller radius rotors might fall a little short. They are even better for extra-wide field applications like football and field hockey. ST-1600 rotors are available in two configurations:

ST-1600B

This model is a 13 cm pop-up with adjustable-arc and full-circle capabilities in one rotor. All internal components of this rotor are accessible from the top without disturbing the synthetic surface. It is ideally suited for installation within Hunter's ST-243642B vault, or in the natural turf that is sometimes adjacent to the synthetic field to be irrigated.

ST-1600BR

This model is a compact and unobtrusive riser-mounted rotor with adjustable-arc and full-circle capabilities. This model is perfect for those installations where it is preferable to keep all irrigation piping and equipment away from the synthetic surface. The riser-mounted configuration also allows existing synthetic sports fields to be retrofitted for irrigation without disturbing the playing surface. Riser-mounted configurations are typically installed at elevations that promote safety and protection from the rotor's high-flow water stream.

Traditional swing joints will cause the rotor to move back and forth as the elevation of the rotor is raised and lowered. While appropriate for natural turf installations, synthetic turf systems require a completely different approach. The best way to support the rotor's tremendous lateral thrust during operation is to place the rotor in a snug fitting hole within the vault's cover set. In order to set the rotor perfectly to grade and in this very specific location the swing joint must provide flexible movement in every direction, not only up and down, but also forward, backward, left and right. Ideally, this flexibility would include the ability to "reset" the elevation grade of the rotor should the vault settle downward during the vibratory compaction of the surrounding field base material. Enter the Hunter Vertical Alignment (VA) swing joint. Offering the ultimate in flexibility, our vertical alignment swing joint includes six pivot points for multi-axis movement plus a seventh pivot at the outlet for rotational adjustments of the valve and rotor assembly. Constructed of rugged 80 mm (3") PVC pipe and fittings, this 21.7 bar; 2,172 kPa rated swing joint dramatically reduces dangerous water velocities and performance robbing pressure loss through the ST System's components.

The Hunter ST vault's complimentary blend of features include construction grade fiberglass in the body, high impact polymer-concrete on the exposed upper rim and a near indestructible polymer-concrete cover set. Together, they form a 20,000+ lb. rated enclosure that is durable, yet easy to install at 170 lbs. with the covers removed.

The exclusive 3” thick four-piece polymer-concrete cover set has a perfectly located cast-in hole for the ST-1600B rotor on one side. This design allows the rotor to be held perfectly to grade within the hole while the enclosure is back-filled from the exposed opposite side. Quick couplers are a must-have around every synthetic field. The cast-in quick coupler port and cover on the opposite side eliminates the need for separate quick coupler enclosures around the playing field. A cast-in port & cover for the ST Valve’s on-off-auto selector adds even more flexibility.

All ST Vaults include convenient quick access ports. Quick-couplers provide a convenient source of water for washing down spills and water-soluable paint. Integrated in-vault design eliminates the need for additional quick-coupler enclosures.

The ST-V30K valve kit includes a remotely located On-Off-Auto selector and solenoid manifold assembly. These convenient features bring valve manual control functions and solenoid splice connections closer to the surface for easy access.

Clear Advantage of the Hunter ST Vault

Have you ever tried to bore a hole into polymer-concrete? It is near impossible. How about installing and setting a 500 lb. polymer-concrete enclosure? Not very much fun.

We designed the ST vault to be as lightweight and easy to install as possible without sacrificing durability. From the functionality perspective, the four-piece cover, large interior space and total top access to all components make servicing easier and the system less expensive to maintain.

For some, the preferred approach to designing synthetic turf irrigation systems is the "block" type configuration with remotely located valves that are off the synthetic surface. The benefit of this configuration is that it removes all high-pressure mainlines from beneath the synthetic surface. Through the use of a remotely located isolation valve, constantly pressurized supply lines to the quick couplers can be removed from beneath the synthetic surface as well.

For others, the preferred approach is to use valve-in-head (VIH) rotors. However, typical VIH rotors have an unacceptably high-pressure loss at the high flows and pressures that are inherent in all synthetic turf irrigation systems. As a result, the Hunter ST System utilizes a valve adjacent to head (VAH) configuration. This design lowers the pressure loss down to a very acceptable 0.15 bar; 15 kPa  loss at 65.0 m3/hr; 1,082 l/min through the valve assembly (see slideshow at top of page). The ST-V30K includes a remotely located On-Off-Auto selector and solenoid manifold assembly.  This convenient  features brings valve manual control functions and solenoid splice connections closer to the surface for easy access. (not shown)