MiniBOOSTER Hydraulic Intensifier HC78-4.0-G-W

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Product Description

The HC78 – 4.0 – G – W is a compact, low-leakage miniBOOSTER crafted from stainless steel 316L, capable of delivering pressures up to 1,380 bar while weighing just 5.4 kg. Ideal for applications demanding minimal standby oil consumption, such as solar panel-driven control systems in the oil industry, it features a 2/2 directional valve controlled by a pilot signal from the high-pressure side. This valve cuts off pump supply upon reaching high pressure and reactivates as pressure drops, maintaining high pressure automatically. Adjustment of outlet pressure is achieved by varying the supplied pressure, with various high-pressure adapters available for thread customization.

Additional information

Product Specifications

Versions: 2 different intensification factors
PIN: 20-207 bar
PH: 1,380 bar maximum for media > 5 cSt (mm²/s)
PH: 1,035 bar maximum for media < 5 cSt (mm²/s)
PRETURN: As low as possible (return pressure to tank)
POUTLET: PH = (PIN – PRETURN) x intensification factor
Mounting: Inline tube
Weight: 5.4 kg

Model Versions:

A model = no dump valve
B model = with dump valve
G model = direct proportionally controlled

Material certificate 3.1 on request

Flow Rate

Intensification Factor (i)	Max. Intensified Outlet Flow (l/min)	Max. Inlet Flow (l/min)
4.0	2.0	14.0
6.3	1.4	13.0

Functions Description

The system’s basic operation is depicted in a function diagram. Oil is directed through the directional valve CV to the IN port, flowing through the low leakage valve, internal valves KV1, KV2, and DV to the high-pressure side H, achieving maximum booster flow. As pump pressure is attained on the H side, valves KV1, KV2, and DV close. The oscillating pump unit OP regulates end pressure, automatically stalling when reached. The low leakage valve minimizes leakage by cutting off inlet flow to the booster. If pressure drops occur, it opens to maintain end pressure.

Function Diagram

Function Diagram HC78-4.0-G-W

Dimensions

Dimension Diagram HC78-4.0-G-W

Connection Types

Connection	IN / R	H
1	1/4″ BSPP	M22 x 1.5

High Pressure adapters

Ordering an HC78W

Ordering example of an HC78W with i = 4.0, H1 M22 x 1.5 and H2 9/16-18 UNF, DV incorporated and BSPP connections:

HC78W – 4.0 – B – 12 for media < 5 cSt (mm2/s) tested in water HC78W – 4.0 – B – 12S for media > 5 cSt (mm2/s) tested in hydraulic oil

Attention note!

High-pressure adapter is required, please specify ordering code – see high-pressure adapter table.
High-pressure adapters will be factory mounted.

The G-model is available in 2 variants, when ordering please specify accordingly:

Dynamic – low hysteresis: Ordering example of an HC78W with i = 4.0 RV incorporated, H1 M22 x 1.5 and H2 9/16-18 UNF and BSPP connections: HC78W – 4.0 – G – 12S
Fail safe – high hysteresis: The RV valve opening ratio is to be determined on individual basis. Contact our technical support. Ordering example of an HC78W with i = 4.0 RV with opening ratio x.x incorporated, H1 M22 x 1.5 and H2 9/16-18 UNF and BSPP connections: HC78W – 4.0 – G – x.x – 12S

Model

HC78W

Intensification,i

Select factor
See flow rate table

Model Version.

Select type
A = without DV
B = with DV
G = with proportional valve

Connections.

Select thread
1_ = BSPP, media < 5 cSt
1_S = BSPP, media > 5 cSt

Ordering Code	IN / R	H1	H2	H3
HC78W-___-__-11	1/4″ BSPP	M22 x 1.5	–	–
HC78W-___-__-12	1/4″ BSPP	M22 x 1.5	9/16-18 UNF	–
HC78W-___-__-13	1/4″ BSPP	M22 x 1.5	9/16-18 UNF	9/16-18 UNF

Max. tightening torque BSPP

	IN / R
	1/4″ BSPP
with stainless steel washer	4.0 da/Nm

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MiniBOOSTER Hydraulic Intensifier HC78-4.0-G-W