结构紧凑、坚固。
直接安装于Hägglunds马达。
自由循环功能的压降极低。
允许在最高40 rpm时切换自由循环。
自由转动功能。
允许在最高10 rpm时，从驱动运行切换为自由转动。
ln order to identify Hägglunds equipment exactly, the following ordering code is used. These ordering codes should be stated in full in all correspondence e.g. when ordering spare parts.
01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |
VFCC | A | 1000 |
01 | Free circulation valve | VFCC |
02 | Version | A |
Maximum flow | ||
03 | 1000 l/min | 1000 |
Operation | ||
04 | Electrical operated | E |
Hydraulic actuated | H | |
Electric details | ||
05 | No | 0 |
24 VDC | 1 | |
Explosive environment | ||
06 | Non explosive environment | 0 |
Explosive environment | 1 | |
Modification 1) | ||
07 | 00 | |
Design | ||
08 | Standard | 00 |
Special index 1) | 01 ... 99 | |
Valve adapter | ||
09 | None | XX |
VA 1000 10 | VA | |
| 1) | To be filled in by Bosch Rexroth DC-IA/EHD |
Mechanical specification | Maximum operating pressure | bar | 350 | |
Pilot pressure (to shift main cartridges) | bar | \u200b10 ... 350 | ||
Case pressure at freewheeling (to lift piston assemblies) | bar | 1 ... 1.5 | ||
Maximum flow (see section "Pressure loss diagram") | l/min | 1000 | ||
Hydraulic fluid (refer to data sheet RE 15414 Hydraulic fluid quick reference) | Fluid temperature range | °C | -25 \u2026 +70 | |
Viscosity range | mm²/s | 20 \u2026 380 | ||
Recommended operating viscosity | mm²/s | 40 | ||
Pilot valve interface | CETOP 03 | |||
Weights | Free circulation valve | typical VFCCA 1000 | kg | 85 |
Adapter | VA 1000 10 | kg | 24 | |
Pilot valve (electrical operated) | Solenoid protection class | IP65 (sea water protective) | ||
Solenoid current (24 VDC) | A | 1.25 | ||
Solenoid power (24 VDC) | W | 30 | ||
Surface protection | Surface coating | According to DIN 50979, Fe//ZnNi8//An/T2 | ||
Standard Painting System | SS-EN ISO 12944 C3, durability range M (Std colour RAL 2002) | |||
Area of application according to ATEX directive 2014/34/EU | IM2, II2G, II2D, II3G, II3D | |
Protection of the valve by liquid immersion according to | k (EN 13463-8) | |
Constructional safety according to | c (EN 13463-5) | |
Maximum surface temperature | °C | + 100 |
Temperature class | T4 | |
Conforms to \u201cEquipment and components intended for use in potentially explosive atmospheres and in underground mines\u201d | EN 1710 | |
ATEX Classification of valve | II 2 G D c k T4 / I M2 c k T4 | |
Ambient temperature range | °C | -25 \u2026 +50 |
Voltage | VDC | 24 |
Voltage tolerance | % | ± 10 |
Nominal power at ambient temperature +20 ºC | W | 17 |
Maximum power with 1.1 x nominal voltage and an ambient temperature of 20 °C | W | 20.6 |
Protection class | IP66 |
Area of application according to directive 2014/34/EU | II 2G | |
Type of protection valve | c (EN 13463-5) | |
Maximum surface temperature | °C | + 135 |
Temperature class | T4 | |
Type of protection valve solenoid according to EN 60079-7 / EN 60079-18 | Ex eb mb IIC T4 Gb | |
Type examination certificate solenoid | KEMA 02ATEX2240 X | |
IECEx Certificate of Conformity solenoid | IECEx DEK 12.0068X | |
Ambient temperature range | °C | -20 \u2026 +70 |
自由循环运行时，马达压力损失和阀损失会转化为回路中的热量。为了使油温保持在允许范围内，可能需要进行换油循环。
示例：Hägglunds CA 100（排量 6.28 l/rev），运行转速为 150 rpm。
本计算示例说明如何确定马达流量。
流经马达的流量 q = Vi ⋅ n
q = 流量 (l/min)
Vi = 马达排量 (cm 3 ⋅ 1000/rev)
n = 转速 (rpm)
马达流量 q = 6.28 x 150 = 942 l/min
本计算示例说明如何确定总压降。
dp = 阀内 Am 至 Cm 的压力损失 = 19.5 bar（根据压力损失曲线）
dp1 = 马达的压力损失 = 12.5 bar（见 CA 马达数据表的“压力损失曲线”章节）
压力损失 = 19.5 bar + 12.5 bar = 32 bar
本计算示例说明如何计算功率损失。
计算所需冲洗流量，使回路温度最多比冲洗油温高出 ΔT 15 °C。
q flushing = 2.3 x E l/min
E (功率) 的定义：
积累能量：W, W = m x c x ΔT
单位时间积累的能量：E (功率) E = W/t
要使回路温度最多比冲洗油温高出 ΔT 15 °C，所需流量为：
q flushing = 2.3 x 50.2 = 115.46 l/min
Symbol | Description | Unit | |
E | Power | W | |
c | Spec. heat capacity oil | kJ/kgK | coil = 2 kJ/kgK |
q | Oil flushing flow | m3/s | |
ρ | Oil density | kg/m3 | ρoil = 870 kg/m3 |
ΔT | Temperature difference | °C |
ΔT = 15 °C（示例）
q = (1/(c x ρ x ΔT)) x E [l/min]
q = (60000/(2000 x 13050)) x E [W] [l/min]
q = 0.0023 x E [W] [l/min]
q = 2.3 x E [kW] [l/min]
Dimensions in mm
Dimensions in mm
Dimensions in mm
警告标志
本手册使用以下标志提示潜在危险，这些危险可能或必然造成人身伤害或重大财产损失。根据危险发生的可能性，以及可能造成的人身伤害或财产损失的严重程度，共分为三个等级。
Warning sign (warning triangle) | Draws attention to the hazard |
Signal word | Identifies the degree of hazard |
Type of risk | Specifies the type or source of the hazard |
Consequences | Describes the consequences of non-compliance |
Precautions | Specifies how the hazard can be prevented |
Warning sign, signal word | Meaning |
| | Indicates a dangerous situation which will cause death or severe personal injuries if not avoided. |
| | Indicates a dangerous situation which may cause death or severe personal injuries if not avoided. |
| | Indicates a dangerous situation which may cause minor or medium personal injuries if not avoided. |
| | Material damage: the product or its environment could be damaged. |
| |
Danger from excessively high pressure! Danger to life or risk of injury, damage to equipment! Using the valve above the permissible maximum pressure can cause valve burst and hydraulic fluid to escape under high pressure.
|
Pressurized valve Danger to life risk of injuries when working on valve in system not being depressurized.
|
| |
Unsafe work on the valve Danger to life or risk of injury, damage to equipment!
|
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Escaping oil mist! Risk of explosion, fire health hazard, environmental pollution.
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Static discharge Cleaning the valve with a dry rug may lead to explosions through electrostatic discharge that may cause severe injuries and even death.
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Lack of grounding Risk of explosion that may cause severe injuries and even death.
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Painting Risk of explosion that may cause severe injuries and even death.
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