No's. 53-A & 54-A Navy - These units are manufactured to conform to military specification
Mil-I-20037-B and are classified as follows:

Type 1 - Non-Automatic: no ball check, suitable for maximum working pressure up to 100 p.s.i.
Type 2 - Automatic: Unit has automatic ball check, suitable for maximum working pressure up to 300 p.s.i.
Class A - General: Guard rod type protection for gauge glass.
Class B - Shielded: Tubular brass shield around gauge glass (price upon request).

-Units are available to fit all requirements. In ordering, state size, type and class required.
-Upon request, units can be supplied with A.S.A. or military flanges, 150# or 300# in either 1/2" or 3/4" size. Flanges will be "silver soldered" to bodies.

Construction:
Bodies:
Forged Bronze Alloy 632M.
Trim: Naval Brass Per QQ-B-637.
Glass: Red Line, Reflex Tubular per Mil-G-2695.
Rods: Four 1/4" Diameter Solid Brass.
Drain Valve Connection: 3/8" Female Pipe.
-This unit with "polycarbonate tube" meets "high shock" requirements of Mil-S-901C and the "Vibration" requirements of Mil-Std-167 for Type 1 vibration up to 25 c.p.s. (certified test reports available upon request).

Number
53-A
54-A
Pipe Thread 1/2" 3/4"
Glass Size
3/4" O.D. 2" shorter than centers
3/4" O.D. 2" shorter than centers
Rod Length
1" shorter than centers
1" shorter than centers
Navy approved. U.S.C.G. Approved. Each unit individually tested.
All units supplied to/for Coast Guard shall be Type II & shall also have a ball check in the upper body.
No's. 104-A Shock Proof - This unit meets the high shock requirements of Mil-S-901C, and the vibration requirements of Mil-Std-167, for Type 1 vibration up to 25 c.p.s. (certified test reports available upon request).

-Unit per Mil-I-20037-B
-Navy approved.
-Automatic type - quick closing.
-Each unit individually hydrostatically tested at 450 p.s.i.
-Unit is of bronze construction with "monel" trim, "viton" seals, and "polycarbonate" tube.
-Flanges are integral to bodies and are per A.S.A. standards for 3/4"-150# flanges. Different flanges available upon request.
-Unless otherwise specified, unit will be shipped complete with "polycarbonate" tube for 24" centers.
Upon request, this unit can also be supplied with high pressure gauge glass with "Class B" protective shield.

No's. 4, 5 & 7 - Polished forged body, composition handles. Tested for pressures up to 200lbs. Four guards.
Number
4
5
7
Pipe Thread 3/8" 1/2"
3/4"
Glass Size
5/8" O.D. 11/2"
shorter than centers
5/8" O.D. 11/2"
shorter than centers
3/4" O.D.
2" shorter than centers
Rod Length
(four per set)
3/4" shorter than centers
3/4" shorter than centers
1" shorter than centers
- Available in most center distance sizes
- Can be furnished with or without ball check. Furnished without check unless specified.
**When ordering gauge glass and guard rods, the center-to-center distance between the upper and lower valve connections must be specified.