Murphy Dump Valves DV Series - Manual

DV-98110B
Revised 11-99
Catalog Section 15
(00-02-0325)
Dump Valves
DV Series
■ For Separators/Scrubbers to 2000 psi (13.7 MPa)
[137 bar] Vessel Pressure
■ Unique Positive-Seal, Field-Replaceable
Piston Seal and Body Seat Assembly
■ Operates on 30–70 psi (207–483 kPa)
[2.07–4.83 bar] Control Pressure
■ Built-In Valve Open/Closed Pop-Up
Indicator Button
■ Compatible with Murphy Level Controls
Description
The DV850, DV875, and DV2100 are pneumati-
cally controlled dump valves. They open and
close automatically by pneumatic control from a
Murphy L1200NDVOR or similar level con-
troller and dump valve operator. Diaphragm
actuated, the DV series dump valves operate at
30–70 psi (207–483 kPa) [2.07–4.83 bar] and up
to 2000 psi (13.7 MPa) [137 bar] vessel pressure.
See “Operating Pressures” chart.
Murphy offers stainless steel versions of the DV850,
DV875, and DV2100 Series.
NOTE: All stainless steel versions carry Canadian
Registration Number OC1476.2.
Application
Primarily designed for compressor scrubbers,
these valves can be used to dump any liquids
compatible with the valve's specifications.
Specifications
Operating Temperature:
-30 to +300°F (-34.4 to +149°C)
Valve Operating Pressure:
30–70 psi (207–483 kPa) [2.07–4.83 bar]
Maximum Process Pressure:
2000 psi (13.7 MPa) [137 bar]
Stem Seal: Carbon/Graphite Filled PTFE
Upper Case Coating: Electroless Nickel Plated
on 12L14 Carbon Steel.
Body Material: DV850, DV875, and DV2100:
Electroless Nickel Plated 12L14 Carbon Steel
DV850SS, DV875SS, and DV2100SS: ANSI
316 (UNS31600) Stainless Steel
Wetted Parts: Body: 12L14 Carbon Steel.
Optional ANSI 316 stainless steel.
Shaft/Stem; ANSI 316 stainless steel.
Guidebushing: ANSI 316 stainless steel.
Body Seat: ANSI 316 stainless steel.
Piston Seal: ANSI 316 stainless steel.
Dimensions
DV875
Patent Pending
500
Vessel Pressure (PSIG)
Minimum Control Pressure (PSIG)
1000 1500 2000 0
25
30
35
40
45
50
55
60
65
70
Operating vs. Vessel Pressure
DV850/875
DV
21
00
®
MURPHY MATIC
®
FRANK W.
MFR.
F Drain
Connection
Piston Seal
Body Seat
Vent
Valve Open/Closed
Indicator Button
Body
Seat
Piston
Seal
B
G
C
D
E
Pressure Inlet Port
A
Positive-Seal
Detail
DV850/SS DV875/SS DV2100/SS
A 6-3/4 (171) 6-3/4 (171) 6-3/4 (171)
B 7-9/64 (181) 7-9/64 (181) 7-59/64 (201)
C 3-9/32 (83) 3-9/32 (83) 3-63/64 (101)
D 2-19/64 (58) 2-19/64 (58) 2-5/32 (55)
E 1 NPT 1 NPT 2 NPT
F 1/2 NPT 3/4 NPT 1 NPT
G 1/8 NPT 1/8 NPT 1/8 NPT
NOTE: Dimensions are in inches and (millimeters)
Operating Pressures