Pneumatic Pressure / Vacuum Hand Pumps (direct acting) DPPV (100 psi / 7 bar) pressure, (-25” Hg / -635 mm Hg) vacuum The ideal solution for either differential pressure or vacuum calibration using a precision test gauge or pressure calibrator as the pressure reference. 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 temperature fluctuations Made in U.S.A. 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. R alston Ins t rum ent s, L LC w ww.ralsto nins t .com 1 . 8 0 0 . 3 47.6575