Made in: Japan
Manufacturer: NACHI
Model: PZ Series (PZ-2B-35, PZ-2B-45, PZ-3B-70, PZ-4B-100, PZ-5B-130, PZ-6B-180, PZ-6B-220)

Features

• Half-cylindrical swash plate and 11 pistons for low noise and low pulsation
• Spherical valve plate for high efficiency
  (Employed into 3B, 4B and 6B.)
• Various capacities ranging from 35 to 220cm³/rev
  (7 sizes in total)
• Multiple string option with our IPH series inscribed gear pump.
• The electro-hydraulic propotional control valve uses the proven force feed-back system for improved hysteresis, repeatability, and response.

Perfomance

Static feature of PZ-3B-70E3A

Typical example of control performance Static feature of PZ – 3B – 70 E3A
Input current – Characteristics of flow	Input current – Characteristics of pressure

Application

• Ideal for machinery requiring optional pressure/flow settings such as injection molding machines and forging equipment

Specifications

Pump type	Capacity (cm3/rev)	Maximum working pressure (MPa)	Rotational speed (min-1)		Mass (kg)
			Minimum	Maximum
PZ-2B-35	35	21	500	2000	36
PZ-2B-45	45	21	500	2000	36
PZ-3B-70	70	21	500	1800	60
PZ-4B-100	100	21	500	1800	76
PZ-5B-130	130	21	500	1800	100
PZ-6B-180	180	21	500	1800	160
PZ-6B-220	220	21	500	1500	162

Electromagnetic proportional control specifications

Rated current :	800 mA
Coil resistance:	20
Hysteresis :	3% F.S. or less

Operational theory

1. Load Sensing Control

2. Load Sensing Control

• When a variable pump (pressure compensating) is combined with a flow control valve:

3.Load Sensing Control

• With a load sensing control pump is used: