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Counterbalance Valve Specs 2018

A counterbalance valve with pilot assist is used to control flow from port 2 to port 1 during overrunning loads, while a pilot-assisted relief valve controls flow from port 1 to port 2. Pilot pressure at port 3 lowers the relief valve setting proportionally. Key specifications include maximum settings of 280 bar for LCBCA or 350 bar for LCBCG/LCBCH, with maximum recommended load pressures of 215 bar and 270 bar respectively. Flow rates vary according to pressure drop curves provided.

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92 views2 pages

Counterbalance Valve Specs 2018

A counterbalance valve with pilot assist is used to control flow from port 2 to port 1 during overrunning loads, while a pilot-assisted relief valve controls flow from port 1 to port 2. Pilot pressure at port 3 lowers the relief valve setting proportionally. Key specifications include maximum settings of 280 bar for LCBCA or 350 bar for LCBCG/LCBCH, with maximum recommended load pressures of 215 bar and 270 bar respectively. Flow rates vary according to pressure drop curves provided.

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LCBCA/LCBCG/LCBCH

平衡阀
工作 OPERATION
标准型 /standard
Counterbalance valves with pilot assist are meant for control on overrunning load. The
check valve allows free flow from port ② to port ① while a direct-acting, pilot-assisted
说明 DESCRIPTION relief valve controls flow from port ① to port ② . Pilot assist at port ③ lowers the
A cartridge-style standard effective setting of the relief valve at a rate determined by the pilot ratio.
capacity counterbalance valve 带先导开启平衡阀用于控制超越负载工况。油液从②口到①口单向自由流动；油液经
直动，先导辅助从①口溢流到②口，③口是溢流辅助控制口，按控制比降低溢流功能
平衡阀
的有效设定值。
特性 FEATURES
• Counterbalance valves should be set at least 1.3 times the maximum load induced
pressure.
最大设定压力至少为最大负载压力的 1.3 倍。
• Backpressure at port ② adds to the effective relief setting at a ratio of 1 plus the pilot
ratio times the backpressure.
②口的背压按“控制比 +1”的倍数加到溢流阀的设定值上即增加值 =(1+ 控制比 )× 压
力值。
• Reseat exceeds 85% of set pressure when the valve is standard set. Setting lower
than the standard set pressure may result in lower reseat percentages.
标准设定时 , 闭合压力值大于设定压力值的 85%；低于标准设定 , 则闭合压力值的百
分比相应降低。
SYMBOL
• Factory pressure setting established at 30cc/min(2 in3/min).
工厂的设定是指当溢流阀开启（流量为 30cc/min）时的压力。

技术参数 SPECIFICATIONS
最大设定值(Max. Setting): 280 bar (LCBCA)
350 bar (LCBCG/LCBCH)
最大负载(Max. Recommended Load Pressure at Max. Setting): 215bar(LCBCA)
270bar(LCBCG/LCBCH)
流量(Flow): See PRESSURE DROP VS.FLOW graph.
内泄漏(Internal Leakage): 5 drops/min(滴/分).
控制比(Pilot Ratio): (LCBCA) 3: 1；(LCBCG) 4.5: 1;(LCBCH) 10: 1
温度(Temperature): -40°F to +250°F(-40°C to +120°C)
过滤(Filtration): See page (参见) N-1
油液(Fluids): Mineral-based fluids with viscosities of 7.4 to 420 cSt.(矿物油粘度)
插孔(Cavity): SUN T-11A, See page M-6
阀块材料(Body Material):
6061-T6 aluminum alloy rated to 207bar, Steel & Ductile iron rated to 350bar
6061-T6铝,允许使用最大压力207bar 钢和球铁允许使用最大压力350bar

压力 – 流量曲线 PRESSURE DROP VS.FLOW

32cSt oil @ 40°C

G-3 克泰液压产品样本 2018 年 9 月


订货代号 TO ORDER

LCB * * – * * * – * *
1 2 3 4 5 6 7

1 功能 4 控制方式 Control 7 阀块油口 Body Porting


LCB= 平衡阀 L=Standard Screw Adjustment 空白 Blank= 不带阀块 None
Counterbalance Cartridge Valve 6T=SAE6 3G=G 3/8
5 弹簧调压范围 Spring Ranges
8T=SAE8 4G=G 1/2
2 流量 Flow
6 油封 Seal Kits
C=60L/min ※ 阀块详见章节 K-17―K-22
N= 丁晴橡胶 Buna N
V= 氟橡胶 其它螺纹油口也是可选择的
3 控制比 Pilot Ratio Viton
A=3:1; G=4.5:1; H=10:1 Other Porting is Available

弹簧调压 LCBCA: 弹簧调压 LCBCG: 弹簧调压 LCBCH:


H=1000-4000psi(70-280bar) J=2000-5000psi(140-350bar) C=2000-5000psi(140-350bar)
Preset:3000psi(210bar)(Check:1.7bar) Preset:3000psi(210bar)(Check:1.7bar) Preset:3000psi(210bar)(Check:0.3bar)
I=400-1500psi(28-105bar) K=1000-2500psi(70-175bar) D=1000-2500psi(70-175bar)
Preset:1000psi(70bar)(Check:1.7bar) Preset:2000psi(140bar)(Check:1.7bar) Preset:2000psi(140bar)(Check:0.3bar)
A=1000-4000psi(70-280bar) C=2000-5000psi(140-350bar) J=2000-5000psi(140-350bar)
Preset:3000psi(210bar)(Check:0.3bar) Preset:3000psi(210bar)(Check:0.3bar) Preset:3000psi(210bar)(Check:1.7bar) G
B=400-1500psi(28-105bar) D=1000-2500psi(70-175bar) K=1000-2500psi(70-175bar)
Preset:1000psi(70bar)(Check:0.3bar) Preset:2000psi(140bar)(Check:0.3bar) Preset:2000psi(140bar)(Check:1.7bar)

安装尺寸 INSTALLATION DIMENSIONS

Unit=Millimeters

克泰液压产品样本 2018 年 9 月 G-4

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