Pressure Test & Calibration Pumps
Stable Pneumatic and Hydraulic Pressure Generation
Additel pressure pumps provide stable pneumatic or hydraulic pressure generation for calibration and comparison testing. Customers can select from portable hand pumps, benchtop systems, and high-pressure models designed for field or laboratory use.
Products
Additel 993 Handheld Pneumatic Pressure Pump
95% vacuum to 1,000 psi (70 bar)
Dual-stage pre-pressure piston: higher pressure with less effort
Lever pressurization for quick stabilization, fine adjust screw for precise setting
Adjustable reference port and dual rubber grips allow horizontal or vertical operation
Included hose with hand-tight quick connectors for fast swapping of units under test
Weighs 3.5 lb (1.6 kg)
Custom machined for rugged, leak-free, low maintenance service
Overview
The Additel 993 handheld pneumatic pump modernizes the traditional squeeze pump: a dual-stage piston builds pressure to 1,000 psi or 95% vacuum with far less hand effort, the lever action stabilizes quickly, and the fine adjust screw dials in the exact test point. The adjustable reference port and dual grips let it work horizontally or vertically, and the included hose connects gauges hand-tight with no tape or wrenches. Pair it with a matching-range Additel gauge for a complete field calibration kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT993. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Flexible hose
ADT100-X-FNG
Carrying case
Additel 992 Handheld Pneumatic Pressure Pump
95% vacuum to 700 psi (50 bar)
Dual-stage pre-pressure piston: higher pressure with less effort
Lever pressurization for quick stabilization, fine adjust screw for precise setting
Adjustable reference port and dual rubber grips allow horizontal or vertical operation
Included hose with hand-tight quick connectors for fast swapping of units under test
Weighs 3.5 lb (1.6 kg)
Custom machined for rugged, leak-free, low maintenance service
Overview
The Additel 992 handheld pneumatic pump modernizes the traditional squeeze pump: a dual-stage piston builds pressure to 700 psi or 95% vacuum with far less hand effort, the lever action stabilizes quickly, and the fine adjust screw dials in the exact test point. The adjustable reference port and dual grips let it work horizontally or vertically, and the included hose connects gauges hand-tight with no tape or wrenches. Pair it with a matching-range Additel gauge for a complete field calibration kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT992. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Flexible hose
ADT100-X-FNG
Carrying case
Additel 919A Pneumatic High Pressure Test Pump
95% vacuum to 2,000 psi (140 bar)
Long lever design reaches 2,000 psi in about 30 seconds
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 919A is a hand operated pneumatic test pump generating 95% vacuum to 2,000 psi (140 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT919A. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case
Additel 918 Pneumatic Pressure Test Pump
95% vacuum to 1,500 psi (100 bar)
Portable, only 5.7 lb
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 918 is a hand operated pneumatic test pump generating 95% vacuum to 1,500 psi (100 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT918. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case
Additel 917 Pneumatic Pressure Test Pump
95% vacuum to 1,000 psi (70 bar)
Portable, only 5.7 lb
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 917 is a hand operated pneumatic test pump generating 95% vacuum to 1,000 psi (70 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT917. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case
Additel 916A Pneumatic Pressure Test Pump
95% vacuum to 600 psi (40 bar)
Portable, only 5.9 lb
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 916A is a hand operated pneumatic test pump generating 95% vacuum to 600 psi (40 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT916A. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case (916A-X-SET models only)
Additel 914A Handheld Pneumatic Pressure Test Pump
95% vacuum to 375 psi (25 bar)
Portable, only 3.3 lb
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 914A is a hand operated pneumatic test pump generating 95% vacuum to 375 psi (25 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT914A. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case
Additel 912A Low Pressure Test Pump
95% vacuum to 60 psi (4 bar)
Isothermal bellows chamber for exceptional stability
Screw press resolution to 0.1 Pa (0.001 mbar)
Hand-tight quick connectors, minimal maintenance
Overview
The Additel 912A is built for stable low pressure calibration. Instead of the usual check valve, it uses an isothermal bellows chamber that shields the trapped volume from ambient temperature changes, so the pressure does not wander when the room shifts or the pump is touched. The screw press adjusts with a resolution of 0.1 Pa (0.001 mbar), fine enough for draft range and low differential work. Hand-tight quick connectors keep gauge changes quick.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT912A. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case (912A-X-SETmodels only)
Additel 901B Low Pressure Test Pump
-6 to 6 psi (-0.4 to 0.4 bar)
Portable, only 3.5 lb
Isothermal bellows chamber for exceptional stability
Screw press resolution to 0.1 Pa (0.001 mbar)
Dual pressure module design
Hand-tight quick connectors, minimal maintenance
Overview
The Additel 901B is built for stable low pressure calibration. Instead of the usual check valve, it uses an isothermal bellows chamber that shields the trapped volume from ambient temperature changes, so the pressure does not wander when the room shifts or the pump is touched. The screw press adjusts with a resolution of 0.1 Pa (0.001 mbar), fine enough for draft range and low differential work. Hand-tight quick connectors keep gauge changes quick.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT901B. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Manual
Carrying case (901B-X-SETmodels only)
Additel 946A Hydraulic High Pressure Calibration Pump
Generates pressure to 15,000 psi (1,000 bar)
Dual-piston system: hand pump fills large volumes, fine-adjust screw press sets pressure smoothly
Isolation valve separates the calibration volume from the hand pump check valve for stable readings and less maintenance
Three hand-tight quick connectors, no PTFE tape or wrenches needed
Overview
The Additel 946A is a benchtop comparison test pump for calibrating gauges, indicators, and transducers to 15,000 psi. The dual-piston design pairs a hand pump for filling large-volume workloads with a fine-adjust screw press for smooth pressure changes, and the isolation valve keeps the check valve, a common source of leaks, out of the measurement path. Three quick connectors make hooking up the reference and units under test fast. A water-service version (946AW) is available.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT946AW. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
Additel 946A Hydraulic High Pressure Calibration Pump
Generates pressure to 15,000 psi (1,000 bar)
Dual-piston system: hand pump fills large volumes, fine-adjust screw press sets pressure smoothly
Isolation valve separates the calibration volume from the hand pump check valve for stable readings and less maintenance
Three hand-tight quick connectors, no PTFE tape or wrenches needed
Overview
The Additel 946A is a benchtop comparison test pump for calibrating gauges, indicators, and transducers to 15,000 psi. The dual-piston design pairs a hand pump for filling large-volume workloads with a fine-adjust screw press for smooth pressure changes, and the isolation valve keeps the check valve, a common source of leaks, out of the measurement path. Three quick connectors make hooking up the reference and units under test fast. A water-service version (946AW) is available.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT946A. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
Additel 928A Hydraulic Pressure Test Pump
Pressurize large-volume workloads
Generate to 15,000 psi (1,000 bar) pressure
Portable, only 8.6 lb (3.9 kg)
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 928A is a hand operated pump generating pressure to 15,000 psi. Its dual-piston system pairs a hand pump for filling large-volume workloads with a fine adjustment for smooth pressure control, and an isolation valve separates the calibration volume from the hand pump check valve, the usual source of leaks, so measurements stay stable and maintenance stays low. Two hand-tight quick connectors need no PTFE tape or wrenches. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory. Corrosion resistant (928AC) and water service (928AW) versions are available.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT928AW. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
Additel 928A Hydraulic Pressure Test Pump
Pressurize large-volume workloads
Generate to 15,000 psi (1,000 bar) pressure
Portable, only 8.6 lb (3.9 kg)
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 928A is a hand operated pump generating pressure to 15,000 psi. Its dual-piston system pairs a hand pump for filling large-volume workloads with a fine adjustment for smooth pressure control, and an isolation valve separates the calibration volume from the hand pump check valve, the usual source of leaks, so measurements stay stable and maintenance stays low. Two hand-tight quick connectors need no PTFE tape or wrenches. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory. Corrosion resistant (928AC) and water service (928AW) versions are available.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT928AC. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
Additel 928A Hydraulic Pressure Test Pump
Pressurize large-volume workloads
Generate to 15,000 psi (1,000 bar) pressure
Portable, only 8.6 lb (3.9 kg)
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 928A is a hand operated pump generating pressure to 15,000 psi. Its dual-piston system pairs a hand pump for filling large-volume workloads with a fine adjustment for smooth pressure control, and an isolation valve separates the calibration volume from the hand pump check valve, the usual source of leaks, so measurements stay stable and maintenance stays low. Two hand-tight quick connectors need no PTFE tape or wrenches. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory. Corrosion resistant (928AC) and water service (928AW) versions are available.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT928A. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
Additel 927 Hydraulic Pressure Test Pump
Portable and hand operated
Minimal maintenance
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 927 is a hand operated pump generating pressure from 85% vacuum to 10,000 psi (700 bar). Its patented screw press technology builds high pressure easily and adjusts smoothly in both directions, and because the design has no check valve, it avoids the leakage issues common to most hand pumps and keeps maintenance minimal. Hand-tight quick connectors need no PTFE tape or wrenches. uses oil as its working medium. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT927W. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
The Additel 927W is the deionized-water version of the 927, for water-service applications.
Additel 927 Hydraulic Pressure Test Pump
Portable and hand operated
Minimal maintenance
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 927 is a hand operated pump generating pressure from 85% vacuum to 10,000 psi (700 bar). Its patented screw press technology builds high pressure easily and adjusts smoothly in both directions, and because the design has no check valve, it avoids the leakage issues common to most hand pumps and keeps maintenance minimal. Hand-tight quick connectors need no PTFE tape or wrenches. uses oil as its working medium. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT927. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
A deionized-water version, the Additel 927W, is also available.
Additel 925 Handheld Hydraulic Pressure Test Pump
Portable, only 3.7 lb (1.7 kg)
Minimal maintenance
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 925 is a hand operated pump generating pressure from 85% vacuum to 6,000 psi (400 bar). Its patented screw press technology builds high pressure easily and adjusts smoothly in both directions, and because the design has no check valve, it avoids the leakage issues common to most hand pumps and keeps maintenance minimal. Two hand-tight quick connectors let you connect and disconnect without PTFE tape or wrenches. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT925W. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
Additel 925 Handheld Hydraulic Pressure Test Pump
Portable, only 3.7 lb (1.7 kg)
Minimal maintenance
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 925 is a hand operated pump generating pressure from 85% vacuum to 6,000 psi (400 bar). Its patented screw press technology builds high pressure easily and adjusts smoothly in both directions, and because the design has no check valve, it avoids the leakage issues common to most hand pumps and keeps maintenance minimal. Two hand-tight quick connectors let you connect and disconnect without PTFE tape or wrenches. An ideal comparison test pump for calibrating gauges, indicators, and transducers in the field or laboratory.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT925. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Carrying case
A deionized-water version, the Additel 925W, is also available.
Additel 920 Pneumatic High Pressure Test Pump
95% vacuum to 3,000 psi (200 bar)
Long lever design reaches 3,000 psi in about 40 seconds
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 920 is a hand operated pneumatic test pump generating 95% vacuum to 3,000 psi (200 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit. The 920HV version adds high vacuum capability.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT920HV. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case
Additel 920 Pneumatic High Pressure Test Pump
95% vacuum to 3,000 psi (200 bar)
Long lever design reaches 3,000 psi in about 40 seconds
High-quality screw press for fine adjustment, resolution to 10 Pa (0.1 mbar)
Shut-off valve holds pressure stable during calibration
Built-in gas-liquid isolator protects the pump from moisture and dirt
Two hand-tight quick connectors, no PTFE tape or wrenches
Overview
The Additel 920 is a hand operated pneumatic test pump generating 95% vacuum to 3,000 psi (200 bar). The screw press adjusts pressure finely enough for calibration work, the shut-off valve keeps the reading stable while you compare, and the gas-liquid isolator keeps moisture and debris out of the mechanism so maintenance stays minimal. Hand-tight quick connectors make swapping gauges fast. Pair with a matching-range Additel gauge for a complete comparison kit. The 920HV version adds high vacuum capability.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT920. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
O-ring
Carrying case
Additel 997 Handheld Hydraulic Pressure Pump
Handheld and portable
Minimal maintenance
Increase and decrease pressure smoothly
Hand-tight quick connectors
Overview
The Additel 997 puts a 10,000 psi (700 bar) hydraulic pressure source in one hand, covering 0 to 10,000 psi (700 bar), oil-tested. . It handles a wide range of field calibration work that would otherwise need a benchtop pump, with hand-tight connectors for quick gauge changes. Pair it with a matching-range Additel gauge for a complete portable calibration kit.
Available configurations. Process Connection: 1/4 BSP, 1/2 BSP, M20x1.5, 1/4 NPT, 1/2 NPT. Configuration: Pump only, Set (with accessories).
Base model ADT997. Each configuration has its own Additel part number, shown as the SKU on your order.
Accessories
Mineral oil
O-ring
Flexible hose
ADT100-X-M18M
Carrying case
Download Datasheet (PDF)