Directions for use

NALFLEET™ Oxygen Control can be used in all boiler systems, from low to high pressures and in conjunction with mechanical de-aeration systems. The treatment combines with dissolved oxygen to form water and inert nitrogen gas, thus effectively removing O2 from the water. No solid materials are produced, so there is no contribution to the increase in total dissolved solids -a critical factor in high pressure boilers. The removal of dissolved oxygen is vital for preventing oxygen pitting and corrosion in boilers. NALFLEET™ Oxygen Control reacts with ferrous and non-ferrous oxides to prevent general corrosion.Ferric oxide (red rust, Fe2O3) is converted to magnetite (black iron oxide, Fe3O4), which is a tough corrosion resistant oxide which protects the metal surface. The term for this is 'passivating' the surfaces, so that they are protected from further corrosion.

Dosing method

For optimum protection, NALFLEET™ Oxygen Control should be fed continuously into the boiler feed line, after the feed pump recirculating valve, using an automatic dosing systems. For steam turbine systems, NALFLEET™ Oxygen Control can be dosed into the cross over between the H.P. and L.P. turbines or the storage section of the deaerator for full protection.

Dosage and control

The objective is to maintain a hydrazine residual between 0.05-1.0 ppm depending on operating pressure and boiler design. Actual consumption is determined under operating conditions.

Recommended Control Limits in ppm. These are typical values. Follow boiler manufacturers guidelines where required.

Wet lay-up

When wet lay-up of the boiler is required then a minimum dosage of 1.25 litres/tonne of boiler water is required.

Sampling and testing

A representative sample of boiler water should be drawn for analysis daily. The sample should always be taken from the same point after blowdown, cooled and tested immediately. Follow the WSS Test Kit instructions and log the results in Waterproof. The results should be sent to WSS as stated in the Waterproof instructions.
It is important that regular testing is carried out to ensure levels of treatment are correct.

产品特性

• NALFLEET™ Oxygen Control 是一种易于使用的液体产品

• 对电导率没有贡献

• 保护锅炉
，蒸汽管道，冷凝水管线和给水管道免受腐蚀

• 催化剂快速作用

• 辅助机械除气

• 简单测试以确定药量水平

• NALFLEET™ Oxygen control 可用于调节用于在潮湿条件下铺设锅炉的水。

优势

• 经济实惠

• 减少铁和铜的腐蚀，提高系统寿命和可靠性

• 钝化锅炉中的金属

Product Number                           Product name

571315                                       OXYGEN CONTROL 25 LTR

化验盒联氨
，P碱度
，氯化物和pH试纸

Product Number                           Product name                     Description

555490                                       SPECTRAPAK 312            Hydrazine

739490                                       SPECTRAPAK 315            P Alkalinity,Chloride and pH

使用说明

NALFLEET™ Oxygen Control 可用于所有锅炉系统
，从低压到高压，并与机械除气系统配合使用
。该处理与溶解氧结合形成水和

惰性氮气，从而有效地从水中去除O2。不产生固体材料，因此对总溶解固体的增加没有贡献

- 高压锅炉的关键因素。去除溶解氧对于防止锅炉中的氧气点蚀和腐蚀至关重要。NALFLEET™氧气控制与黑色金属和有色金属氧化物反应
，防止全面腐蚀。氧化铁（红锈，Fe2O3）转化为磁铁矿（黑色氧化铁

，Fe3O4），这是一种坚韧的耐腐蚀氧化物
，可保护金属表面。这个术语是“钝化”表面，以防止它们进一步腐蚀
。

加药方法

为了获得最佳保护，NALFLEET™ Oxygen Control应使用自动配料系统在进料泵循环阀后连续送入锅炉给水管路
。对于蒸汽轮机系统，可以将NALFLEET™ Oxygen Control剂加入到H.P.之间的交叉处。和L.P.涡轮机或除氧器的储存部分

，以提供全面保护
。

剂量和控制

目的是根据操作压力和锅炉设计将Hydrazine残留量保持在0.05-1.0ppm之间
。实际消耗量根据运行条件确定。.

HYDRAZINE TEST RESULT ppm

推荐的控制限值，单位为ppm
。这些是典型值
。

根据需要遵循锅炉制造商的指导

当需要对锅炉进行湿式铺设时
，需要最低剂量为1.25升/吨的锅炉水。

采样和测试

应每天抽取一份代表性的锅炉水样本进行分析。排污后应始终从同一点取样
，冷却并立即进行测试
。

按照WSS测试套件说明进行操作，并将结果记录在防水中。结果应按照防水说明中的说明发送至WSS
。

重要的是进行定期测试以确保治疗水平正确。