Table of Contents
Advertisement
Quick Links
Instruction Manual
MCK-1008
March 2009
N100, N100A, N110, and N120 Series Differential
Bypass and Backpressure Valves
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
and/or fire causing property damage and
personal injury or death.
Fisher
equipment must be installed,
®
operated, and maintained in accordance
with federal, state, and local codes
and manufacturer's instructions. The
installation in most states must also
comply with NFPA. 58 or ANSI
standard K61.1.
Only personnel trained in the proper
procedures, codes, standards, and
regulations of the LP-Gas or Anhydrous
Ammonia industries should install and
service this equipment.
Introduction
Scope of the Manual
This manual covers instructions for the N100, N100A,
N110, and N120 Series Differential Bypass and
Backpressure Valves, shown in Figure 1.
Description
These valves are designed for use with propane,
butane, and anhydrous ammonia at ambient
temperatures. The valves can be used on other
compressed gases, but the user should check with
the factory to make sure the valve is suitable for the
particular service.
A 1/4 NPT tapped and plugged boss on the inlet side
of the body can be used to install a hydrostatic relief
valve or a pressure gauge.
N100, N100A, N110, and N120 Series
The Types N100, N100A, and N110 have internal sensing
orifices so that no external sensing line is required.
N100 and N100A Series Bypass Valves
These valves are designed for bypass applications
on NPS 2 through 4 (DN 50 through 100) size pumps.
The throttling action of the valves allows only surplus
pump discharge to be returned to the tank.
N110 Series Bypass Valve
These valves are designed for bypass applications
on smaller pumps (5 to 40 GPM (18,9 to 151 l/min)
propane) used on stationary tanks or delivery trucks.
N120 Series Backpressure Valve
These valves are intended for use with smaller pumps
on cylinder filling applications. When installed after
the liquid meter, the Type N120 holds a differential
backpressure on the meter to prevent vapor from forming
within the meter. An external sensing line is required.
www.emersonprocess.com/regulators/lp
TYPE N110
TYPE N100
Figure 1. Bypass and Backpressure Valves
TYPE N120
Advertisement
Table of Contents
Related Manuals for Emerson Fisher N100 Series
Summary of Contents for Emerson Fisher N100 Series
- Page 1 N100, N100A, N110, and N120 Series Instruction Manual MCK-1008 March 2009 N100, N100A, N110, and N120 Series Differential Bypass and Backpressure Valves WARNING Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion, and/or fire causing property damage and personal injury or death.
-
Page 2: Specifications
N100, N100A, N110, and N120 Series Specifications Type Numbers, Differential Pressure Maximum Working Pressure Settings and Ranges 400 psig (27,6 bar) See Tables 1, 2, and 3 Temperature Capabilities -20° to 140°F (-29° to 60°C) Table 1 Bypass Valves (For Large Pumps) DIFFERENTIAL PRESSURE DIFFERENTIAL PRESSURE PUMP SIZE... -
Page 3: Principle Of Operation
N100, N100A, N110, and N120 Series TO VAPOR TO VAPOR SPACE SPACE CONNECTION LIQUID PRODUCT LIQUID PRODUCT FROM TANK VAPOR SPACE OR VAPOR ELIMINATOR TYPE N100 FISHER ® N110 FISHER SERIES INTERNAL INTERNAL HOSE VALVE VALVE TO FILLER VALVE TO FILLER METER VALVE PUMP... -
Page 4: Disassembly And Repair
N100, N100A, N110, and N120 Series screw clockwise (into the spring case) to increase Type N110 Disassembly the differential setting or counterclockwise (out of the Refer to Figure 5: spring case) to decrease the setting. 1. Unscrew the union nut (key 11) and remove the Use a pressure gauge on the outlet of the valve to spring case (key 7) from the body (key 1). -
Page 5: Parts Ordering
N100, N100A, N110, and N120 Series INSTALL OPENING IN POSITION SHOWN (GREASE MUST NOT FILL HOLE) BP3845 DC - USE DOW CORNING NO. 3 GREASE AS - USE ANTI-SEIZE ON THREADS Figure 4. Types N100 and N100A Bypass Valve Assembly Parts Ordering 3. - Page 6 N100, N100A, N110, and N120 Series STAMP TYPE NUMBER, SPRING RANGE, AND DATE AS - USE ANTI-SEIZE ON THREADS T10583 Figure 5. Type N110 Bypass Valve Assembly Type N100 and N100A Bypass Valve Description Part Number (Figure 4) (continued) O-Ring, Nitrile (NBR) Types N100 and N100A (NPS 1 thru 1-1/2) T12942T0012 Type N100 (NPS 2 and 2-1/2)
- Page 7 N100, N100A, N110, and N120 Series STAMP TYPE NUMBER, SPRING SETTING, AND DATE LOCTITE GRADE D LOCTITE AS - USE ANTI-SEIZE ON THREADS PART NOT SHOWN: KEY 15 17 19 18 T10695 Figure 6. Type N120 Backpressure Valve Assembly...
- Page 8 For further information visit www.emersonprocess.com/regulators/lp The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls, Inc., a business of Emerson Process Management.