Install Instructions

ManualsBrandsHoneywell ManualsDampersPneumatic Pressure Reducing Valve for Dual Pressure System

PP901A & B Pressure Reducing Valves

DESCRIPTION

The PP901A & B Pressure Reducing Valves regulate the

pressure of air delivered to pneumatic control system

devices. The PP901A operates in a single pressure

system and delivers a regulated air pressure. The PP901B

operates in a two-pressure system and delivers two

independent regulated air pressures.

The PP901A & B include a safety relief valve that protects

the downstream line from excessive main line pressure

surges. A gage connection accommodates a 305915

0-30 psi Gage (“Gage”) for measurement of the regulated

pressure.

BEFORE INSTALLING NOTE

A coalescing filter is required upstream of the

PP901A & B.

Also, if no Gage is used, PP901 installation requires a

CCT1705T 1/8-inch Pipe Plug.

INSTALLATION INSTRUCTIONS

INSTALLATION

Mounting

Refer to job drawings and Fig. 1. Mount PP901A or B in

one of the following ways:

— Wall- or panel-mounted using provided Bracket.

Bracket includes mounting slots for two 1/4-20x5/

8 inch screws (provided).

— Directly supported on system piping

Piping

 Connect PP901A & B INLET and OUTLET piping

(Fig. 1).

 Mount Gage or CCT1705T Pipe Plug in

1/8-inch NPT gage connection on PP901A & B.

®U.S. Registered Trademark

95-2558

Summary of content (4 pages)

PAGE 1
PP901A & B Pressure Reducing Valves INSTALLATION INSTRUCTIONS DESCRIPTION INSTALLATION The PP901A & B Pressure Reducing Valves regulate the pressure of air delivered to pneumatic control system devices. The PP901A operates in a single pressure system and delivers a regulated air pressure. The PP901B operates in a two-pressure system and delivers two independent regulated air pressures.
PAGE 2
PP901A & B PRESSURE REDUCING VALVES 3-1/4 (83) TOP VIEW 1-7/8 (48) 1-1/2 (38) 5/8 (16) 2-5/16 (59) 1-3/8 (35) 1/8-IN NPT REMOTE PILOT CONNECTION (PP901B) 7/8 (23) 1/8-IN NPT GAUGE CONNECTION EXHAUST PORTS 3-1/64 (77) 3-31/32 (101) OUT IN 1/4-IN NPT INLET AND OUTLET 3-1/4 (83) FRONT VIEW POSITION BRACKET UPWARD OR DOWNWARD SIDE VIEW M12004 Fig. 1. PP901A & B Dimensions in Inches (Millimeters).
PAGE 3
PP901A & B PRESSURE REDUCING VALVES PP901B (Fig. 4) Turn pressure reducing adjustment screw clockwise to increase primary (lower) pressure. (For primary pressure, the pressure reducing adjustment screw on the PP901B does not have a locknut.) LOCKNUT Secondary Reduced Pressure Setting (PP901B Only) Use the following procedure and Fig. 4 to change the secondary (higher) pressure to the desired system pressure. VENT NOTE: Perform the Primary Reduced Pressure Setting procedure before this procedure.
PAGE 4
PP901A & B PRESSURE REDUCING VALVES Connections: Inlet and outlet: 1/4 in. NPT (female) Gage: 1/8 in. NPT (female). Remote Pilot (PP901B): 1/8 in. NPT (female) Accessories: 14004205-002 Coalescing Filter For PP901B switchover: RP418A/B Electric-Pneumatic Relay or SP470A/B Two-Position Pneumatic Switch 14003638-001 Mounting Kit Operation PP901A & B (Fig. 2) A given pressure reducing adjustment screw setting creates a force on the pilot diaphragm by tension on pressure reducing adjustment spring.