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Installation 

00-02-0483

page 1 of 4

Installation and Operation Manual for 

DVU Series Dump Valves

Models: DVU150, DVU175, DVU2105, DVU2115 and DVU2120

00-02-0483

Revised 10-08

Section 15

Please read the following information before installing.  A visual inspection of this product for damage during shipping is recommended

before mounting. It is your responsibility to have a qualified person install this unit and make sure it conforms to local codes.

GENERAL INFORMATION

WARNING

BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

Disconnect all electrical power to the machine.
Make sure the machine cannot operate during installation.
Follow all safety warnings of the machine manufacturer.
Read and follow all installation instructions.

500

500

10

20

30

40

50

60

70

Vessel Pressure (PSIG)

M

in

im

um

 C

on

tr

ol

 P

re

ss

ur

(P

SI

G

)

Co

nt

ro

l P

re

ss

ur

(P

SI

G

)

1000

1000

1500

1500

1800

2000

0

0

20

30

40

45

50

60

Vessel Pressure (PSIG)

Maximum Actuation 
Pressure

Minimum Actuation Pressure

DVU2105 

DVU2115 

DVU2120 

DVU150/175 

Pressure 

Inlet Port

1/8 in.-27 NPT

 

Manual Valve
Operator 

A

B

C

D

E

Drain

Connection

Plug Seal

Vent 

Union 

Weep Hole 

Valve Open/Closed

Indicator Button

(dimension shown 

for reference only)

G

Fig. 2

Dimensions (all models)

Specifications

Operating Temperature: 

-30 to 250°F (-34.4 to +121°C)

Valve Operating Pressure: 

Refer to chart, Fig 1.

Maximum Process Pressure:

DVU2120:

2000 psi (13.8 MPa) [138 bar].

DVU2115:

1500 psi (10.3 MPa) [103 bar].

DVU2105:

500 psi (3.44 MPa) [34 bar].

DVU150 and DVU175:

1800 psi (12.4 MPa) [124 bar].

Flow Characteristics:

See chart, page 4 (DVU150/175 models only).

Body Material:

Electroless Nickel Plated 12L14 Carbon Steel

Internal Wetted Parts:

Plug Seal: 

90 Durometer Urethane.

Other: 

303 stainless steel; Electroless Nickel Plated 12L14 Carbon Steel

Shipping Weights: 

DVU150 and DVU175:

9 lbs. (4 kg.).

Shipping Weights: 

DVU2105, DVU2115 and DVU2120:

14 lbs. (6.4 kg.).

Shipping Dimensions: 

7-1/2 x 7-1/2 x 10-3/4 in. (191 x 191 x 274 mm.).

Fig. 1

Control Pressure vs. Working Pressure

Model

Inlet

Outlet

Trim Size

DVU2120

2 NPT

1 NPT

0.436 in. (11 mm)

DVU2115

2 NPT

1 NPT

0.576 in. (15 mm)

DVU2105

2 NPT

1 NPT

0.859 in. (22 mm)

DVU175

1 NPT

3/4 NPT

0.359 in. (9 mm)

DVU150

1 NPT

1/2 NPT

0.359 in. (9 mm)

Description

The DVU Series models are pneumatically controlled dump valves. 

The valves open and close automatically by pneumatic control from a

Murphy L1200NDVOR or similar level controller and dump valve opera-

tor. Diaphragm actuated, the DVU series dump valves operate at 30–70 psi

(207–483 kPa) [2.07–4.83 bar] and up to 2000 psi (13.8 MPa) [138 bar]

vessel pressure (depending on the model).

A key benefit of this design is a hex union that provides the ability 

to replace the seat without removing the valve from piping.

Model

A

B

C

D

E

F

G

DVU2120

7.50 (191)

8.0 (203)

2.75 (70)

1.0 (25)

2-11.5 NPT 1-11.5 NPT

1.03

DVU2115

7.50 (191)

8.0 (203)

2.75 (70)

1.0 (25)

2-11.5 NPT 1-11.5 NPT

1.03

DVU2105

7.50 (191)

8.0 (203)

2.75 (70)

1.0 (25)

2-11.5 NPT 1-11.5 NPT

1.03

DVU175

7.50 (191) 6.75 (171)

2.06 (52)

1.0 (25)

1-11.5 NPT 3/4”-14 NPT

1.03

DVU150

7.50 (191) 6.75 (171)

2.06 (52)

1.0 (25)

1-11.5 NPT 1/2”-14 NPT

1.03

NOTE: Dimensions are in inches and (millimeters)

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