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Sample

Catalog No.

Seat Size

Seat Type

Construction

1, 1A

206380-002F

3/16

Metal

Standard

1N, 1AN

NP8300141EF

3/16

Metal

NICOTEF

2, 2A

206380-006F

5/16

Metal

Standard

2N, 2AN

NP8300383EF

5/16

Metal

NICOTEF

3, 3A

206380-006RF

5/16

Resilient

Standard

3N, 3AN

NP8300383ERF

5/16

Resilient

NICOTEF

Table 1 provides a summary of the test samples. Test samples also included equivalent size valves with the standard seat and disc construction to serve as control pieces for comparison with the original qualification testing.

Table 1. Test Specimen Summary

4, 4A

206380-002RF

3/16

Resilient

4N, 4AN

NP8300141ERF

3/16

Resilient

Standard NICOTEF

Testing consisted of operating the valves for a minimum of 40,000 on/ off cycles. This number of cycles was intended to repeat previous wear aging testing of the ASCO NP line of valves in ASCO report AQR 67368. This value was thought to conservatively represent the number of cycles a valve would see during its installed life.

Test pressures of 100 psid for the 5/16 orifice and 150 psid for the 3/16-inch orifice were used during the testing. 100 psid represents the maximum rated pressure for the 5/16 orifice valve. Although the 3/16-orifice valve is rated at 200 psi, 150 psid was used due to system limitations. Valves were monitored for leakage and proper operation at approximately 5,000 cycle intervals. Tables 2 and 3 provide a summary of this testing.

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