Manual

The sub-base numbers shown in the chart below

specify pressure ports with NPT threads, and

electrical openings with 1/2 NPT threads.

Sub-base for

= 4.2 valves illustrated.

Sub-Bases for Series W70 & W74 ANSI Valves

Electrical connection conforming to ANSI standard B93.55M is available.

For more information, refer to ROSS Bulletin 379 (form number A10090).

ANSI SUB-BASES

Type of Sub-Base

Outlet Indicator Lights in Base* Avg. Dimensions inches (mm)

Port None One Two C

A B C

1/4 500B91 525K91 526K91 0.9 to 1.0 2.8 (72) 1.6 (41) 6.2 (157)

3/8 501B91 527K91 528K91 0.9 to 1.0 2.8 (72) 1.6 (41) 6.2 (157

3/8 474K91 482K91 484K91 2.0 to 2.5 3.6 (91) 1.5 (37) 7.1 (180)

1/2 475K91 483K91 485K91 2.0 to 2.5 3.6 (91) 1.5 (37) 7.1 (180)

3/8 361B91 — — 4.2 3.3 (84) 2.7 (67) 7.2 (183)

Side-Ported

1/2 362B91 — — 4.2 3.3 (84) 2.7 (67) 7.2 (183)

3/4 363B91 — — 4.2 3.3 (84) 2.7 (67) 7.2 (183)

3/4 364B91 — — 10 to 11 5.1 (130) 3.8 (96) 10.5 (266)

1 365B91 — — 10 to 11 5.1 (130) 3.8 (96) 10.5 (266)

1¼ 366B91 — — 10 to 11 5.1 (130) 3.8 (96) 10.5 (266)

1¼ 367B91 — — 22 6.4 (163) 3.7 (94) 12.4 (314)

1½ 368B91 — — 22 6.4 (163) 3.7 (94) 12.4 (314)

1/4 499B91 529K91 530K91 0.9 to 1.0 2.8 (72) 1.5 (37) 6.2 (157)

Side and

3/8 476K91 477K91 486K91 2.0 to 2.5 3.6 (91) 1.5 (37) 7.1 (180)

Bottom-Ported

3/8 369B91 — — 4.2 3.4 (86) 2.7 (67) 7.2 (183)

1/2 370B91 — — 4.2 3.4 (86) 2.7 (67) 7.2 (183)

3/4 371B91 — — 4.2 3.4 (86) 2.7 (67) 7.2 (183)

3/4 372B91 — — 10 to 11 5.1 (130) 3.9 (99) 10.5 (266)

1 373B91 — — 10 to 11 5.1 (130) 3.9 (99) 10.5 (266)

Bottom-Ported

1¼ 374B91 — — 10 to 11 5.1 (130) 3.9 (99) 10.5 (266)

1¼ 375B91 — — 22 6.4 (163) 3.8 (98) 12.4 (314)

1½ 376B91 — — 22 6.4 (163) 3.8 (98) 12.4 (314)

*NPT port threads. For BSPP threads, add a “D” preﬁx to the model number; for JIS threads, add a “J” preﬁx to the model number.

IMPORTANT NOTE: Please read carefully and thoroughly all of the CAUTIONS on the inside back cover.