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R alston Instruments, LLC

Pneumatic Pressure / Vacuum Hand Pumps (direct acting)

DPPV (100 psi / 7 bar) pressure, (-25” Hg / -635 mm Hg) vacuum

Specifications

Pump connection type

National Pipe Thread (NPT)

British Parallel Thread (BSPP)*

Maximum pressure

100 psi (7 bar)

100 psi (7 bar)

Maximum vacuum

-25” Hg (-635 mm Hg)

-25” Hg (-635 mm Hg)

Style

Direct acting

Direct acting

Pressure media

Air

Air

Fine adjust resolution

± 0.001 psi (0.07 mbar)

± 0.001 psi (0.07 mbar)

Reference connection (brass)

See below

See below

Outlet port 1 (brass)

Male Quick-test (QTHA-3SB0)

Male Quick-test (QTHA-3SB0)

Outlet port 2 (brass)

Male Quick-test with cap and chain (QTFT-3SB0)

Male Quick-test with cap and chain (QTFT-3SB0)

Calibration hose (brass ends)

(1) 3 ft (92 cm) long (QTQT-HOS-3’)

(1) 1 m (3.3 ft) long (QTQT-HOS-1m)

Process connection (brass)

(1) 1/4” male NPT (QTHA-2MB0)

(1) 1/4” female BSPP (QTHA-2FB0-RG)

Construction

Anodized aluminum, brass, plated steel

Anodized aluminum, brass, plated steel

Seal material

Buna-N,Teflon™, Delrin™

Buna-N,Teflon™, Delrin™

Weight

1.9 lb (860 g)

1.9 lb (860 g)

Ordering Information

DPPV pumps with NPT connections

Model

Description

DPPV-1MBA

DPPV pump, 1/8” male NPT gauge adapter (QTHA-1MBA), hose, process connection

DPPV-2MBA

DPPV pump, 1/4” female NPT gauge adapter (QTHA-2MBA), hose, process connection

DPPV-2FBA

DPPV pump, 1/4” female NPT gauge adapter (QTHA-2FBA), hose, process connection

DPPV-0000

DPPV pump, no gauge adapter, with hose and process connection

DPPV pumps with BSPP connections*

Model

Description

DPPV-2FBA-RG

DPPV pump, 1/4” female BSPP gauge adapter (QTHA-2FBA-RG), hose, process connection

DPPV-3FBA-RG

DPPV pump, 3/8” female BSPP gauge adapter (QTHA-3FBA-RG), hose, process connection

DPPV-4FBA-RG

DPPV pump, 1/2” female BSPP gauge adapter (QTHA-4FBA-RG), hose, process connection

* Not for sale in North American market

For accessories, repair kits and hoses see page 17. For a complete list of accessories and parts see product manual or detailed specification sheet.

For a list of the most commonly used gauge and process connections see page 18. For a complete list refer to Ralston Instruments Pressure

Connection catalog. Contact your Ralston Instruments dealer or the factory for information on reference gauges and pressure calibration kits.

The ideal solution for either differential pressure or vacuum calibration

using a precision test gauge or pressure calibrator as the pressure refer-

ence.

Features:

Generate either 100 psi (7 bar) pressure or -25” Hg (-635 mm Hg) vacuum

with the same pump

Unique design allows the user to convert from pressure to vacuum by

simply twisting a knob, even with gloves on

Two outlet ports allow connection to reference pressure gauge or pressure

calibrator as well as device under test, thus eliminating a tee

Large volume fine adjustment piston provides precise control, even at very

low pressures

Precisely vent pressure with soft seated bleed valve

Low volume Quick-test hose, gauge adapter and process connection can

be attached to pump without thread sealant or a wrench

Rugged, all metal construction reduces pressure changes due to tempera-

ture fluctuations

Made in U.S.A.