Install Instructions

ManualsBrandsHoffman ManualsBoiler PartsSPS-30 Spring Pressure Control Pilot

• Before using this product read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application,

installation, and maintenance of plumbing, steam, and electrical equipment and/or systems in

accordance with all applicable codes and ordinances.

• Turn off steam supply before installing or servicing.

• Open supply valves slowly to prevent water hammer or sudden shock.

• Wear heat resistant gloves before adjusting steam valves.

• Handle regulator with extreme caution. Do not lift regulator by any external tubing.

Failure to follow this warning may result in property damage, serious burns, personal injury

or death.

ARNING

CAUTION

WARNING

Series SPS Spring Pilots

For Series 2000 Pilot-Operated

Regulators

Series SPS Spring Pilots

The Series SPS Spring Pilot Control Valve senses and balances

downstream pressure against an adjustable spring to control a

Series 2000 Pilot Operated Regulator main valve and thus regu-

late downstream pressure to a set point. The Series 2000

Regulator reduces a steady or varying inlet pressure to a con-

stant, adjustable delivery pressure.

The Series SPS pilots are spring loaded. Normal accuracy of

regulation is within 10% of set point. The adjustable range of the

delivery pressure is governed by the choice of adjusting spring

as shown below.

Pressure Wire

Range Spring Diameter

psig (bar) Color in. (mm)

2-30 (0.1-2.0) Blue

⁄16 (4)

5-60 (0.3-4.1) Red

⁄4 (6)

20-175 (1.4-11.9) Gold

⁄32 (9)

Hoffman Specialty

Installation & Maintenance

Instructions

HS-621(A)

Summary of content (6 pages)

PAGE 1
Hoffman Specialty Installation & Maintenance Instructions HS-621(A) Series SPS Spring Pilots For Series 2000 Pilot-Operated Regulators The Series SPS Spring Pilot Control Valve senses and balances downstream pressure against an adjustable spring to control a Series 2000 Pilot Operated Regulator main valve and thus regulate downstream pressure to a set point. The Series 2000 Regulator reduces a steady or varying inlet pressure to a constant, adjustable delivery pressure.
PAGE 2
INSTALLATION • The mounting hardware kits contain all of the hardware required to install the spring pilot valve on the main valve. • Pipe sealant should be applied to all pipe threads. Do not use Teflon® tape. Note: Follow manufacturer’s instructions for applying pipe sealant. Keep sealant off first thread. • The preformed copper tubing (included in the hardware kits) may have to be shortened with a tubing cutter. Ream to restore original inside diameter of tubing.
PAGE 3
2. Make sure the bleed orifice is installed in the 1/8 NPT tapping on the outlet end of the main valve on the opposite side from the U-tubing. Remove the 1/8 NPT pipe plug from the bleed orifice and replace it with a 1/8 NPT x 1/4” (6mm) O.D. tubing, straight compression fitting. 3. Install the 1/4 NPT x 1-1/2” (38mm) nipple and half the union connection on the inlet end of the main valve. 4. Use the 1/4 NPT x 4” (101mm) nipple and the remaining half of the union connection to mount the pilot. 5.
PAGE 4
START-UP PROCEDURE 1. Make sure inlet stop valve is closed. 2. Open 1/4 NPT feedback control line shut-off valve. 3. Open outlet stop valve and all equipment drain valves. Allow system to drain completely. ! CAUTION • Never open a reducing valve without positive indication that the high side is clear of condensate. Be sure no one is in area of any open end of pipes when steam is turned on. Failure to follow this caution may result in serious burns. 4. Make sure bypass globe valve is tightly closed. 5.
PAGE 5
MAINTENANCE 1 y; y; ;yy;y;y;y;;y;y;y;y;y;y;y;y;y;y;yy;y;y;y;y;y;y;y;y; ;y;y;y y; y; y; y; y;y;y;y;y;y; y; y; 2 3 4 5 ;y ;y ;y;y;y;y;y Dismantling 1. Release compression on adjusting spring (2) by loosening adjusting nuts (1) an equal amount. 2. Remove diaphragm nuts (3) and lift off cowl (4). Lift out diaphragm assembly (5,6 & 7). 3. Disassemble diaphragm assembly by removing diaphragm screw (7) from pressure plate (5). 4. Remove blind flange bolts (16) and take off blind flange (15).
PAGE 6
Hoffman Specialty MAINTENANCE SERVICE (cont’d) 7. Reinsert stem into pilot body. Install disc and stem nut. Check dimension C and, if correct, lock the adjustment by prick punching the stem threads at several points. Work carefully to avoid bending the stem. 8. Scrape away burrs raised by the prick punching. Upper surface of pusher plate must be smooth and flat. 9. Check that the valve travel A = 3/64” (1.2mm). This need not be exact. Stem should move smoothly. Binding indicates a bent stem.